AA80E Automatic Transmission

AA80E AUTOMATIC TRANSMISSION: TORQUE CONVERTER AND DRIVE PLATE: INSPECTION

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.