Engine Idle Vibration (A/T)

Engine idle vibration

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 and transmission mount

Tight valves

Notes

Check the ATF level, and check the ATF lines for leakage and loose connections. If necessary, clean the ATF lines.

Notes

Test the shift solenoid valve function with the HDS.

Notes

Inspect shift solenoid valve D for seizure, and the O-rings for wear and damage.

Notes

Check the transmission and the drive plate installation.

Notes

Check the drive plate for wear and damage, if the drive plate is worn or damaged, replace the drive plate.

Notes

Check the engine control system.

Notes

Replace the torque converter assembly.

Notes

Check the line pressure A/T Pressure Test.

Notes

Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.

Notes

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 ATF pump seizure.

Notes

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.

Notes

Check the lock-up shift valve in the regulator valve body.

Notes

Adjust the transmission and engine mounts by loosening and retightening the mount bolts.

Notes

Check the valve adjustment.