Torque Converter: Testing and Inspection

U341E AUTOMATIC TRANSAXLE: TORQUE CONVERTER CLUTCH AND DRIVE PLATE: INSPECTION

1. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

(a) Inspect the one-way clutch.





(1) Install SST so that it fits into the notch on the converter hub and the notch on the outer race of the one-way clutch.

SST : 09350-32014

09351-32010

09351-32020

(2) 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.

SST : 09350-32014

09351-32010

09351-32020

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

Replace the converter if the one-way clutch still does not operate as specified.

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





(1) If the inspection result of the torque converter clutch assembly meets any of the cases mentioned below, replace the torque converter clutch.

Malfunction Item:

Any metallic sound is heard from the torque converter clutch during stall test or when the shift lever is in the N position.

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

Fine powder exceeding the sample limit is identified in ATF.

(See the sample.)

HINT
The sample shows approximately 0.25 liters (0.26 US qts, 0.22 Imp. qts) of ATF that is taken out from the 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 it with the installation surface facing up.

(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.





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

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

(3) Make sure no spring washers are missing.

2. INSPECT DRIVE PLATE AND RING GEAR SUB-ASSEMBLY

(a) Set up a dial indicator with a roller instrument and measure the drive plate runout.





Maximum runout:

0.20 mm (0.0079 in.)

(b) Check the ring gear for damage.

If the runout is not within the specification or the ring gear is damaged, replace the drive plate and ring gear sub-assembly.