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 serrations of the stator with a finger and rotate it. Check that it rotates smoothly when turned clockwise and locks 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 check.

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





(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 one-way clutch turns clockwise and locks when turned counterclockwise.

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

If the results are not as specified, replace the torque converter clutch assembly.

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.

(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 (radiator).

(e) Avoid damaging the torque converter clutch and the oil pump gear.





(1) When any marks due to interference are found on the end of a bolt for the torque converter clutch or on the bottom of a bolt hole, replace the bolt and torque converter clutch.

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

(3) Make sure that no spring washers are missing.

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 (0.0118 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.