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A/T System Symptom Troubleshooting Index

Symptom
Probable cause(s)
Notes
When you turn the ignition switch to ON (II), the D indicator comes on and stays on in all shift lever positions, or it never comes on at all
  • F-CAN communication line error
  • Gauge control module defective
  • PCM defective
A/T gear position indicator does not come on while the shift lever is in that position
  • F-CAN communication line error
  • Gauge control module defective
  • PCM defective
  • Transmission range switch defective
Shift lever cannot be moved from P while you are pressing on the brake pedal
  • Accelerator pedal position sensor circuit
  • Accelerator pedal position sensor defective
  • Brake pedal position switch circuit
  • Brake pedal position switch defective
  • Shift lock solenoid defective
  • Shift lock solenoid control circuit
  • Shift lock mechanism defective
  • Throttle body defective
  • Transmission range switch ATP P switch stuck OFF
  • Transmission range switch ATP P switch line opened
Ignition switch cannot be moved from ACCESSORY (I) to LOCK (0) (key is pushed in, the shift lever in P)
  • Interlock control system circuit
  • Key interlock solenoid stuck ON
  • Park pin switch stuck ON
  • Transmission range switch
HDS does not communicate with the PCM or the vehicle
DLC circuit error
Shift indicator does not work on five-position transmission
  • F-CAN communication line error
  • Gauge control module defective
  • PCM defective
  • Transmission range switch defective
When you press the paddle shifter + (upshift switch) in D and S, the transmission does not upshift on five-position transmission
A problem in the paddle shifter + (upshift switch) circuit
When you press the paddle shifter − (downshift switch) in D and S, the transmission does not downshift on five-position transmission
A problem in the paddle shifter − (downshift switch) circuit
M indicator does not come on even though the paddle shifter + (upshift switch) or paddle shifter − (downshift switch) is operated in sequential shift mode on five-position transmission
  • F-CAN communication line error
  • Gauge control module defective
  • PCM defective
Engine runs, but vehicle does not move in any gear
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Low ATF level
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
ATF pump worn or binding
Regulator valve stuck or spring worn
ATF strainer clogged
Mainshaft worn or damaged
Final gears worn or damaged
Transmission-to-engine assembly error
Axle disengaged
  • Check the ATF level, and check the ATF cooler lines for leakage and loose connections. If necessary, clean the ATF cooler lines.
  • Check for a loose shift cable at the shift lever and the transmission control lever.
  • Check the stall speed.
  • Check the line pressure.
  • Improper alignment of ATF pump and torque converter housing may cause the ATF pump to seize. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
  • Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause the ATF pump seize.
  • Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
  • Check the regulator valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
  • Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the ATF cooler and cooler lines.
  • Replace the torque converter.
  • Inspect the countershaft and secondary shaft for wear and damage.
  • Check for a misinstalled transmission.



Symptom
Probable cause(s)
Notes
Vehicle moves in 2 and R, but not in 1st in D, D3, S, or 1
1.
2.
3.
1st accumulator defective
1st gears worn or damaged
1st clutch defective
  • Check the 1st clutch pressure.
  • Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the servo body.
  • Inspect the countershaft, secondary shaft, and 1st clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
Vehicle moves in D, D3, S, 1, and R, but not in 2, or in 2nd in S
1.
2.
3.
2nd accumulator defective
2nd gears worn or damaged
2nd clutch defective
  • Check the 2nd clutch pressure.
  • Inspect the 2nd accumulator piston, O-ring, and spring for wear and damaged in the servo body.
  • Inspect the countershaft, secondary shaft, and 2nd clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
  • Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover.
  • Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.
Vehicle moves in D, D3, S, 2, and 1, but not in R
1.
2.
3.
4.
5.
6.
Shift solenoid valve D defective
Shift fork shaft stuck
Shift valve D defective
5th/reverse accumulator defective
5th clutch defective
Reverse gears worn or damaged
  • Check for a stored DTC, and check for loose connections.
  • Test the shift solenoid valve function with the HDS.
  • Inspect the O-rings, and check the shift solenoid valve for seizure.
  • Check the 5th clutch pressure.
  • Check for a missing shift fork bolt on the shift fork shaft.
  • Inspect the servo valve O-ring.
  • Check the shift fork shaft detent for wear and damage.
  • Inspect the 5th accumulator piston, O-ring, and spring for wear and damage in the servo body.
  • Inspect the mainshaft and 5th clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
  • Inspect the reverse selector gear teeth chamfers, and inspect the engagement teeth chamfers of the countershaft 5th gear and reverse gear. Replace the reverse gears and the reverse selector if they are worn or damaged. If the transmission makes a clicking, grinding, or whirring noise, also replace the mainshaft 5th gear, reverse idler gear, and countershaft 5th gear.
Poor acceleration; flares when starting off in D, D3, S, 2, 1, and R; stall speed high in D, D3, S, 2, and 1
1.
2.
3.
4.
5.
6.
Low ATF level
Shift cable broken or out of adjustment
ATF pump worn or binding
Regulator valve stuck or spring worn
ATF strainer clogged
Torque converter check valve defective
  • Check the line pressure.
  • Check the ATF level and check the ATF lines for leakage and loose connections. If necessary, clean the ATF lines.
  • Check for a loose shift cable at the shift lever and the transmission control lever.
  • Improper alignment of ATF pump and torque converter housing may cause the ATF pump to seize. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
  • Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
  • Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the ATF cooler and ATF lines.
  • Check the torque converter check valve in the main valve body for free movement, and check the valve spring for wear and damage.
Poor acceleration; flares when starting off in D, D3, S, 2, and R; stall speed high
2nd clutch defective
  • Check the 2nd clutch pressure.
  • Inspect the secondary shaft and 2nd clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
  • Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover.
  • Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.
Poor acceleration; flares when starting off in D, D3, S, 2, 1, and R; stall speed high in R
1.
2.
Shift cable broken or out of adjustment
5th clutch defective
  • Check for a loose shift cable at the shift lever and the transmission control lever.
  • Check the 5th clutch pressure.
  • Inspect the mainshaft and 5th clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
Poor acceleration; flares when starting off in D, D3, S, 2, 1, and R; stall speed low in D, 2, and 1
1.
2.
3.
4.
5.
Shift solenoid valve D defective
Torque converter one-way clutch defective
Engine output low
Torque converter clutch piston defective
Lock-up shift valve defective
  • Check for a stored DTC, and check for loose connections.
  • Test the shift solenoid valve function with the HDS.
  • Inspect the O-rings, and check the shift solenoid valve for seizure.
  • Replace the torque converter assembly.
  • Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Check the engine control system.
Poor acceleration; flares when starting off in D, D3, S, 2, 1, and R; stall speed low in R
1.
2.
3.
4.
Torque converter one-way clutch defective
Engine output low
Torque converter clutch piston defective
Lock-up shift valve defective
  • Check the engine control system.
  • Replace the torque converter assembly.
  • Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
Engine idle vibration
1.
2.
3.
4.
5.
6.
7.
8.
Low ATF level
Shift solenoid valve D defective
Drive plate defective or transmission misassembled
Engine output low
Torque converter clutch piston defective
ATF pump worn or damaged
Lock-up shift valve defective
Misassembled engine or transmission mount
  • Check the ATF level and check the ATF lines for leakage and loose connections. If necessary, clean the ATF lines.
  • Check for a stored DTC, and check for loose connections.
  • Test the shift solenoid valve function with the HDS.
  • Inspect the O-rings, and check the shift solenoid valve for seizure.
  • Check for a misinstalled/damaged drive plate, replace the drive plate if it is worn or damaged.
  • Check the engine control system.
  • Replace the torque converter assembly.
  • Check the line pressure.
  • Improper alignment of ATF pump and torque converter housing may cause the ATF pump to seize. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
  • Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Adjust the transmission and engine mounts.





Symptom
Probable cause(s)
Notes
Vehicle moves in N
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Excessive ATF
Foreign material in separator plate orifice
Relief valve defective
1st clutch defective
2nd clutch defective
3rd clutch defective
4th clutch defective
5th clutch defective
Clearance between the clutch end-plate and the top disc is incorrect
Needle bearing seized, worn, or damaged
Thrust washer seized, worn, or damaged
  • Check the ATF level, and drain the ATF if it is over-filled.
  • Check the 1st, 2nd, 3rd, 4th, and 5th clutch pressures.
  • Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
  • Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
  • Check the relief valve in the main valve body for free movement, and check the valve spring for wear and damage.
  • Inspect the mainshaft, secondary shaft, 1st, 2nd, 3rd, 4th, and 5th clutches for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
  • Inspect the 2nd, 3rd, and 4th clutch feed pipes.
  • If the 2nd clutch feed pipe is scored, replace the end cover.
  • If the 3rd or 4th clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
  • Replace the secondary shaft if the bushing for the 2nd clutch feed pipe or 4th clutch feed pipe is loose or damaged.
  • Replace the mainshaft if the bushing for the 3rd clutch feed pipe is loose or damaged.
Late shift after shifting from N to D, D3, and S, or excessive shock when shifted into D, D3, and S
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Foreign material in separator plate orifice
Servo control valve defective
1st accumulator defective
1st check ball stuck
Lock-up shift valve defective
1st clutch defective
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings, for wear and damage.
  • Inspect the O-rings, and check the shift solenoid valve seizure.
  • Check for a loose shift cable at the shift lever and the transmission control lever.
  • Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
  • Inspect the sensor O-ring for wear and damage.
  • Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
  • Check the 1st clutch pressure.
  • Check the servo control valve in the main valve body for free movement, and check the valve spring for wear and damage.
  • Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the regulator valve body.
  • Check the 1st check ball for stuck in the main valve body.
  • Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Inspect the secondary shaft and 1st clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
Late shift after shifting from N to R, or excessive shock when shifted into R
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Shift fork shaft stuck
Foreign material in separator plate orifice
Shift valve D defective
5th/reverse accumulator defective
Lock-up shift valve defective
5th clutch defective
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings, for wear and damage.
  • Inspect the O-rings, and check the shift solenoid valve for seizure.
  • Check for a loose shift cable at the shift lever and the transmission control lever.
  • Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
  • Inspect the sensor O-ring for wear and damage.
  • Check for a missing shift fork bolt on the shift fork shaft.
  • Inspect the servo valve O-ring.
  • Check the shift fork shaft detent for wear and damage.
  • Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
  • Check the 5th clutch pressure.
  • Check the shift valve D in the main valve body for free movement, and check the valve spring for wear and damage.
  • Inspect the 5th accumulator piston, O-ring, and spring for wear and damage in the servo body.
  • Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Inspect the mainshaft and 5th clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.



Symptom
Probable cause(s)
Notes
Transmission does not shift
1.
2.
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
  • Check for a stored DTC, and check for loose connections.
  • Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
  • Inspect the sensor O-ring for wear and damage.
Excessive shock or flares on all upshifts and downshifts
1.
2.
3.
4.
5.
6.
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Foreign material in separator plate orifice
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
  • Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
  • Inspect the sensor O-ring for wear and damage.
  • Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.

Symptom
Probable cause(s)
Notes
Excessive shock or flares on 1-2 upshift or 2-1 downshift
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
2nd clutch transmission fluid pressure switch defective
Foreign material in separator plate orifice
1st accumulator defective
2nd accumulator defective
1st check ball stuck
2nd check ball stuck
Lock-up shift valve defective
1st clutch defective
2nd clutch defective
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
  • Inspect the O-rings, and check the shift solenoid valve for seizure.
  • Check for clogged orifice in the transmission fluid pressure switch connector. If the orifice is clogged, remove it and clean the connector.
  • Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
  • Check the 1st and 2nd clutch pressures.
  • Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the servo body.
  • Inspect the 2nd accumulator piston, O-ring, and spring for wear and damage in the servo body.
  • Check the 1st check ball and 2nd check ball for stick in the main valve body.
  • Inspect the secondary shaft, 1st clutch, and 2nd clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
  • Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover.
  • Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.
  • Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.

Symptom
Probable cause(s)
Notes
Excessive shock or flares on 2-3 upshift or 3-2 downshift
1.
2.
3.
4.
5.
6.
7.
8.
9.
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
3rd clutch transmission fluid pressure switch defective
Foreign material in separator plate orifice
2nd accumulator defective
3rd accumulator defective
2nd check ball stuck
2nd clutch defective
3rd clutch defective
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
  • Check for clogged orifice in the transmission fluid pressure switch connector. If the orifice is clogged, remove it and clean the connector.
  • Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
  • Check the 2nd and 3rd clutch pressures.
  • Inspect the 2nd and 3rd accumulator pistons, O-rings, and springs for wear and damage in the servo body.
  • Check the 2nd check ball for stick in the main valve body.
  • Inspect the secondary shaft, mainshaft, 2nd clutch, and 3rd clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
  • Inspect the 2nd and 3rd clutch feed pipes.
  • If the 2nd clutch feed pipe is scored, replace the end cover.
  • If the 3rd clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
  • Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.
  • Replace the mainshaft if the bushing for the 3rd clutch feed pipe is loose or damaged.
Excessive shock or flares on 3-4 upshift or 4-3 downshift
1.
2.
3.
4.
5.
6.
7.
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Foreign material in separator plate orifice
3rd accumulator defective
4th accumulator defective
3rd clutch defective
4th clutch defective
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
  • Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
  • Check the 3rd and 4th clutch pressures.
  • Inspect the 3rd and 4th accumulator pistons, O-rings, and springs for wear and damage in the servo body.
  • Inspect the mainshaft, secondary shaft, 3rd clutch, and 4th clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
  • Inspect the 3rd and 4th clutch feed pipes.
  • If the 3rd clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
  • If the 4th clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
  • Replace the secondary shaft if the bushing for the 4th clutch feed pipe is loose or damaged.
  • Replace the mainshaft if the bushing for the 3rd clutch feed pipe is loose or damaged.
Excessive shock or flares on 4-5 upshift or 5-4 downshift
1.
2.
3.
4.
5.
6.
7.
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Foreign material in separator plate orifice
4th accumulator defective
5th accumulator defective
4th clutch defective
5th clutch defective
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
  • Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
  • Check the 4th and 5th clutch pressures.
  • Inspect the 4th and 5th accumulator pistons, O-rings, and springs for wear and damage in the servo body.
  • Inspect the mainshaft, secondary shaft, 4th clutch, and 5th clutch for wear and damage.
  • Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
  • Inspect the 4th clutch feed pipes. If the 4th clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
  • Replace the secondary shaft if the bushing for the 4th clutch feed pipe is loose or damaged.
Noise from transmission in all shift lever positions
1.
2.
ATF pump worn or damaged
Mainshaft bearing, countershaft bearing, or secondary shaft bearing defective
  • Check the line pressure.
  • Improper alignment of ATF pump and torque converter housing may cause the ATF pump to seize. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
  • Be careful not to damage the torque converter housing when replacing the main ball bearing. Not torquing the valve body to specification could also damage the ATF pump. This could cause the pump to seize.
  • Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
  • Inspect the mainshaft, countershaft, and secondary shaft bearing for wear and damage.
Vehicle does not accelerate above 50 km/h (31 mph)
Torque converter one-way clutch defective
Replace the torque converter assembly.
Vibration in all shift lever positions
Drive plate defective or transmission misassembled
  • Check for a misinstalled/damaged drive plate, replace the drive plate if it is worn or damaged.
  • Check the engine control system.
Shift lever does not operate smoothly
1.
2.
3.
Transmission range switch defective or out of adjustment
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
  • Check for a stored DTC, and check for loose connections.
  • Inspect the transmission range switch. If the transmission range switch is faulty, replace it. If the transmission range switch is out of adjustment, adjust it and shift cable.
  • Check for a loose shift cable at the shift lever and the transmission control lever.
Transmission does not shift into P
1.
2.
3.
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
Park mechanism defective
  • Check for a loose shift cable at the shift lever and the transmission control lever.
  • Check the park pawl spring installation and the park lever spring installation. If installation is incorrect, install the spring correctly. Make sure that the park lever stop is not installed upside down. Check the distance between the park pawl shaft and park lever pin. If the distance is out of tolerance, adjust the distance with the park lever stop.
Torque converter clutch does not disengage
1.
2.
3.
4.
5.
Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
Torque converter clutch piston defective
Lock-up shift valve defective
Lock-up control valve defective
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
  • Inspect the O-rings, and check the shift solenoid valve for seizure.
  • Replace the torque converter assembly.
  • Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Check the lock-up control valve in the main valve body for free movement, and check the valve spring for wear and damage.
Torque converter clutch does not operate smoothly
1.
2.
3.
4.
5.
6.
Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
Torque converter clutch piston defective
Torque converter check valve defective
Lock-up shift valve defective
Lock-up control valve defective
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
  • Inspect the O-rings, and check the shift solenoid valve for seizure.
  • Replace the torque converter assembly.
  • Check the torque converter check valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Check the lock-up control valve in the main valve body for free movement, and check the valve spring for wear and damage.
Torque converter clutch does not engage
1.
2.
3.
4.
5.
6.
7.
8.
Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
Torque converter clutch piston defective
Torque converter check valve defective
Lock-up shift valve defective
Lock-up control valve defective
  • Check for a stored DTC, and check for loose connections.
  • Test the solenoid valve function with the HDS.
  • Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
  • Inspect the O-rings, and check the shift solenoid valve for seizure.
  • Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
  • Inspect the sensor O-ring for wear and damage.
  • Replace the torque converter assembly.
  • Check the torque converter check valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
  • Check the lock-up control valve in the main valve body for free movement, and check the valve spring for wear and damage.
A/T gear position indicator does not indicate shift lever positions
1.
2.
3.
Transmission range switch defective or out of adjustment
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body worn
  • Check for a stored DTC, and check for loose connections.
  • Inspect the transmission range switch. If the transmission range switch is faulty, replace it. If the transmission range switch is out of adjustment, adjust it and shift cable.
  • Check for a loose shift cable at the shift lever and the transmission control lever.
Speedometer and odometer do not work
Output shaft (countershaft) speed sensor defective
  • Check for a stored DTC, and check for loose connections.
  • Check the output shaft (countershaft) speed sensor installation.
  • Inspect the sensor O-ring.
Engine does not rev to high rpm, and the transmission upshifts at low rpm (engine at normal operating temperature)
Engine rocker arm defective
  • Check the engine rocker arms.
  • Check for a restricted or damaged exhaust system.