Torque Converter: Testing and Inspection

U660E 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 spline of the stator with a finger and rotate it. Check that it rotates freely when turned clockwise and locks heavily when turned counterclockwise.

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

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

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





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(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 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 illustration shows approximately 0.025 liters (0.026 US qts, 0.022 Imp. qts) of the 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 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 changed, clean the oil cooler and oil pipe line.

HINT
* Spray compressed air of 196 kPa (2 kgf/cm2, 28 psi) from the inlet hose.
* If excessive fine powder is found in the ATF, add new ATF using a bucket pump and clean it again.

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

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





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

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

(3) Washers must be used with the bolts.

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.)

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