AA80F Automatic Transmission

AA80F 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 stator with a finger and rotate the stator. Check that the stator rotates smoothly when turned clockwise and locks 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 in 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 more 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 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 DRIVE PLATE





(a) Check the drive plate for damage.

(b) Set up a dial indicator and measure the runout of the 6 portions around the torque converter fitting surfaces.

Maximum runout:

0.30 mm (0.018 in.)

If the runout is more than the maximum or if the drive plate is damaged, replace the drive plate.

If installing a new drive pate, be careful of the orientation of the spacers and tighten the bolts Installation.