AA80E Automatic Transmission

AA80E AUTOMATIC TRANSMISSION: TORQUE CONVERTER AND DRIVE PLATE: INSPECTION

1. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

(a) Inspect the 1-way clutch.

(1) Press on the serrations of the starter with a finger and rotate it. Check that it rotates smoothly when turned clockwise and locks up when turned counterclockwise.

If necessary, clean the converter and recheck the 1-way clutch.

Replace the converter if the 1-way clutch still fails the check.





(b) Determine the condition of the torque converter clutch.





(1) Check that the following conditions are met:

* During the stall test or when the shift lever is on N, metallic sounds are not emitted from the torque converter clutch.

* The 1-way clutch turns in one direction and locks in the other direction.

* The amount of powder in the ATF is not greater than the sample shown in the illustration.

HINT
The sample illustration shows approximately 0.25 liters (0.26 US qts, 0.22 Imp. qts) of the ATF taken from a removed torque converter clutch.

(c) Replace the ATF in the torque converter clutch.

(1) If the ATF is discolored and/or has a foul odor, completely stir the ATF in the torque converter clutch and drain the ATF with the torque converter facing upward.

2. INSPECT RUNOUT OF DRIVE PLATE & RING GEAR SUB-ASSEMBLY

(a) Set up a dial indicator and measure the drive plate runout.





Maximum runout:

0.20 mm (0.0079 in.)

If the runout is not within the specification or if the ring gear is damaged, replace the drive plate.