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