Transaxle Unit

U151E AUTOMATIC TRANSAXLE: AUTOMATIC TRANSAXLE UNIT:

INSPECTION

1. INSPECT MULTIPLE DISC CLUTCH CLUTCH HUB

(a) Using a dial indicator, measure the inside diameter of the forward clutch hub bushing
Standard inside diameter:
23.025 - 23.046 mm (0.9065 - 0.9073 in.)
Maximum inside diameter:
23.046 mm (0.9073 in.)

- When the diameter is over the maximum, replace the multiple disc clutch hub with new one.
- Check the contact surface of the bush in the direct clutch shaft. If any scratch or discolor is identified, replace the direct clutch sub-assembly with new one.

If the inside diameter is greater than the maximum, replace the forward clutch hub.
2. INSPECT UNDERDRIVE CLUTCH DISC NO.2

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

- If the lining of the disc comes off or discolors, or even if a part of the groove is defaced, replace all discs.
- Before assembling new discs, soak them in ATF for at least 15 minutes.

3. INSPECT OVERDRIVE DIRECT CLUTCH DRUM SUB-ASSEMBLY

(a) Using a dial indicator, measure the inside diameter of the forward clutch hub bushing.
Standard inside diameter:
23.025 - 23.046 mm (0.9065 - 0.9073 in.)
Maximum inside diameter:
23.046 mm (0.9073 in.)

- When the diameter is over the maximum, replace the multiple disc clutch hub with new one.
- Check the contact surface of the bush in the direct clutch shaft. If any scratch or discolor is identified, replace the direct clutch sub-assembly with new one.

If the inside diameter is greater than the maximum, replace the forward clutch hub.
4. INSPECT 2ND BRAKE CLUTCH DISC

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

- If the lining of the disc comes off or discolors, or even if a part of the groove is defaced, replace all discs.
- Before assembling new discs, soak them in ATF for at least 15 minutes.

6. INSPECT 1ST & REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY

(a) Using a vernier calipers, measure the free length of the spring together with the spring seat.
Standard free length:
17.61 mm (0.6933 in.)
7. INSPECT UNDERDRIVE BRAKE RETURN SPRING SUB-ASSEMBLY

(a) Using a vernier calipers, measure the free length of the spring together with the spring seat.
Standard free length:
13.24 mm (0.5213 in.)
8. INSPECT PACK CLEARANCE OF FIRST & REVERSE BRAKE

(a) Using vernier calipers, measure the distance between the disc surface and the contact surface of the 2nd brake cylinder and transaxle case(Dimension A).
(b) Select an appropriate flange so that the pack clearance will meet the specified value.
Pack clearance:
1.16 - 1.35 mm (0.0457 - 0.0531 in.)

HINT: Piston stroke = Dimension A -Flange thickness

Flange thickness: mm (in.)

(a) Using a vernier calipers, measure the distance between the disc surface and snap ring surface (Dimension B).
(b) Select an appropriate flange so that the pack clearance will meet the specified value.
Pack clearance:
0.62 - 0.91 mm (0.0244 - 0.0358 in.)

HINT: Piston stroke = Dimension B - Flange thickness - Snap ring thickness 1.6 mm (0.063 in.)

Flange thickness: mm (in.)

10. INSPECT PACK CLEARANCE OF UNDERDRIVE BRAKE

(a) Using a dial indicator, measure the underdrive brake pack clearance while applying and releasing compressed air (392 kPa, 4.0 kgf/cm 2, 57 psi).
Pack clearance:
1.81 - 2.20 mm (0.0713 - 0.0866 in.)

HINT: Select an appropriate flange from the table below so that it will meet the specified value.

(b) Temporally remove the snap ring and attach to the flange.
(c) Restore the snap ring.
11. INSPECT UNDERDRIVE 1 WAY CLUTCH ASSEMBLY

(a) Install the underdrive clutch assembly to the 1-way clutch.
(b) Rotate the underdrive clutch assembly to check the rotating direction for the lock or free operation.
12. INSPECT INPUT SHAFT ENDPLAY

(a) Using a dial indicator, measure the input shaft endplay.
Endplay:
0.262 - 1.244 mm (0.01 - 0.049 in.)