Underdrive Clutch

U151E AUTOMATIC TRANSAXLE: UNDERDRIVE CLUTCH: INSPECTION

1. INSPECT UNDERDRIVE PACK CLEARANCE

(a) Install the underdrive clutch to the transaxle case.





NOTICE:
Be careful not to damage the oil seal rings.

(b) Install a dial indicator as shown in the illustration.

(c) Measure the underdrive clutch pack clearance while applying and releasing compressed air (392 kPa, 4.0 kgf/cm2, 57 psi).

Pack clearance:

1.51 to 1.71 mm (0.0594 to 0.0673 in.)

(d) If the pack clearance is not as specified, inspect the discs, plates, and flange.

HINT
There are 5 different thicknesses of flanges available.





2. INSPECT NO. 1 UNDERDRIVE CLUTCH DISC

(a) Check if the sliding surface of the disc, plate, and flange are worn or burnt. If necessary, replace them.





HINT
* If the lining of the disc comes off or discolors, or if a part of the groove is worn, replace all discs.
* Before installing new discs, immerse them in ATF for at least 15 minutes.
3. INSPECT UNDERDRIVE CLUTCH DRUM SUB-ASSEMBLY

(a) Using a dial indicator, measure the inside diameter of the underdrive clutch drum bushing.





Standard drum bushing:

37.06 to 37.08 mm (1.4591 to 1.4598 in.)

Maximum drum bushing:

37.13 mm (1.4618 in.)

(b) If the inside diameter is greater than the maximum, replace the underdrive clutch drum.

4. INSPECT UNDERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY

(a) Using vernier calipers, measure the free length of the spring together with the spring seat.





Standard free length:

17.14 mm (0.6748 in.)