Torque Converter: Testing and Inspection

U760E AUTOMATIC TRANSAXLE: TORQUE CONVERTER CLUTCH AND DRIVE PLATE: INSPECTION

1. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

(a) Inspect the one-way clutch.

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





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

Replace the converter if the one-way clutch still fails the inspection.

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





(1) If the inspection result of the torque converter clutch assembly satisfies the following conditions, replace the torque converter clutch assembly.

Malfunction:

A metallic sound is emitted from the torque converter clutch assembly during the stall test or when the shift lever is moved to N.

The one-way clutch is free or locked in both directions.

The amount of powder in the ATF is greater than the sample shown in the illustration (see the sample).

HINT
The sample shows approximately 0.025 liters (0.026 US qts, 0.022 Imp. qts) of ATF that is taken out from a removed torque converter clutch.

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

(1) If the ATF is discolored and/or has foul odor, stir the ATF in the torque converter clutch thoroughly and drain it.

(d) Clean and check the oil cooler and oil pipe line.





(1) If the torque converter clutch is inspected or the ATF is replaced, clean the oil cooler and oil pipe line.

HINT
* Apply compressed air of 196 kPa (2.0 kgf/ cm2, 28 psi) into the inlet hose.
* If a large amount of powder is found in the ATF, add new ATF using a bucket pump and clean the oil cooler and oil pipe line again.

(2) If the ATF is cloudy, inspect the oil cooler.

(e) Prevent deformation of the torque converter clutch and damage to the oil pump gear.





(1) When there is any damage due to the end of the bolt for the torque converter clutch and to the bottom of the bolt hole, replace the bolt and torque converter clutch.

(2) All of the bolts should be the same length.

(3) Bolts with washers must used.

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 contact surfaces.





Maximum runout:

0.30 mm (0.0118 in.)

If the runout is greater than the maximum or if the drive plate is damaged, replace the drive plate. If installing a new drive plate, note the orientation of the spacers and tighten the bolts Installation.