Poor acceleration; flares when starting off in D, D3, S, 2, 1, and R; stall speed low in D, 2, and 1
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.
Shift solenoid valve D defective
Torque converter one-way clutch defective
Engine output low
Torque converter clutch piston defective
Lock-up shift valve defective