Clutch Drum and Input Shaft Assembly

A760H AUTOMATIC TRANSMISSION: CLUTCH DRUM AND INPUT SHAFT ASSEMBLY: INSPECTION

1. INSPECT UNDERDRIVE ONE WAY CLUTCH ASSEMBLY

(a) Hold the coast clutch hub and turn the one way clutch assembly.

(b) Check that the one way clutch assembly turns freely clockwise and locks counterclockwise.

If there is a problem with the one way clutch, replace it.

2. INSPECT DIRECT CLUTCH RETURN SPRING SUB-ASSEMBLY

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

Standard free length:

19.51 mm (0.768 in.)

(b) If the free length is shorter than the standard free length, replace the clutch return spring sub-assembly.

3. INSPECT REVERSE CLUTCH RETURN SPRING SUB-ASSEMBLY

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

Standard free length:

21.04 mm (0.828 in.)

(b) If the free length is shorter than the standard free length, replace the clutch return spring sub-assembly.

4. INSPECT NO. 2 DIRECT CLUTCH DISC

(a) Check whether the sliding surfaces of the 4 discs, the 5 plates, and the flange are worn or burnt.

(1) Using a dial indicator, measure the moving distance (distance A) of the clutch flange at both ends across a diameter while blowing air from the oil hole as shown in the illustration, and calculate the average.

HINT
Flange moving distance A = 0.25 to 1.08 mm (0.0098 to 0.0425 in.)

Pack clearance = Flange moving distance A - 0.11 mm (0.0043 in.)

Pack Clearance:

0.4 to 0.7 mm (0.0157 to 0.0276 in.)

NOTICE:
Install a selective flange {t = 3.4 mm (0.134 in.)} when measuring the moving distance (shaded area in the illustration).

(2) If the pack clearance is outside the specified range, select and install a clutch flange that brings the pack clearance within the specified range.

HINT
There are 9 types of flanges that can be used to adjust the pack clearance. Select the one with the most appropriate thickness.

Flange thickness:

6. INSPECT PACK CLEARANCE OF NO. 3 CLUTCH

(a) Inspect the pack clearance of the reverse clutch hub sub-assembly.

(1) Using a dial indicator, measure the reverse clutch piston stroke (distance A) and the moving distance (distance B) of the reverse clutch flange at both ends across a diameter while blowing air (392 kPa, 4 kgf/cm2, 57 psi) from the oil hole as shown in the illustration, and calculate the average.

HINT
Piston stroke A = 1.05 to 2.15 mm (0.0413 to 0.0846 in.)

Flange moving distance B = 0.72 to 1.08 mm (0.0284 to 0.0425 in.)

Pack clearance = Piston stroke A - Flange moving distance B - 0.06 mm (0.0024 in.)

Pack Clearance:

0.5 to 0.8 mm (0.020 to 0.031 in.)

NOTICE:
Install a selective flange {t = 3.3 mm (0.130 in.)} when measuring the moving distance (shaded area in the illustration).

(2) If the pack clearance is outside the specified range, select and install a clutch flange that brings the pack clearance within the specified range.

HINT
There are 11 types of flanges that can be used to adjust the pack clearance. Select the one with the most appropriate thickness.

Flange thickness:

7. INSPECT FORWARD CLUTCH RETURN SPRING SUB-ASSEMBLY

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

Standard free length:

24.64 mm (0.9701 in.)

(b) If the free length is shorter than the standard free length, replace the clutch return spring sub-assembly.

8. INSPECT COAST CLUTCH DISC

(a) Check whether the sliding surfaces of the 3 discs, the 3 plates and the flange are worn or burnt.

(b) If necessary, replace them.

NOTICE:
* If the linings of the discs are peeled off or discolored, or even a part of the printed numbers is damaged, replace all discs.
* Before assembling new discs, soak them in ATF for at least 15 minutes.
9. INSPECT PACK CLEARANCE OF COAST CLUTCH

(a) Inspect the pack clearance of the coast clutch hub sub-assembly.

(1) Using a dial indicator, measure the moving distance (distance A) of the clutch flange at both ends across a diameter while blowing air from the oil hole as shown in the illustration, and calculate the average.

HINT
Flange moving distance A = 0.38 to 1.48 mm (0.0150 to 0.0583 in.)

Pack clearance = Flange moving distance A - 0.02 mm (0.0008 in.)

Pack Clearance:

0.3 to 0.6 mm (0.012 to 0.024 in.)

NOTICE:
Install a selective flange {t = 3.0 mm (0.118 in.)} when measuring the moving distance (shaded area in the illustration).

(2) If the pack clearance is outside the specified range, select and install a clutch flange that brings the pack clearance within the specified range.

HINT
There are 10 types of flanges that can be used to adjust the pack clearance. Select the one with the most appropriate thickness.

Flange thickness:

10. INSPECT NO. 1 CLUTCH DISC

(a) Check whether the sliding surfaces of the 4 discs, the 5 plates, and the flange are worn or burnt.

(b) If necessary, replace them.

NOTICE:
* If the linings of the discs are peeled off or discolored, or even a part of the printed numbers is damaged, replace all discs.
* Before assembling new discs, soak them in ATF for at least 15 minutes.
11. INSPECT PACK CLEARANCE OF NO. 1 CLUTCH

(a) Inspect the pack clearance of the No. 1 clutch.

(1) Using a dial indicator, measure the moving distance (distance A) of the clutch flange at both ends across a diameter while blowing air from the oil hole as shown in the illustration, and calculate the average.

HINT
Flange moving distance A = 0.36 to 1.50 mm (0.0142 to 0.0591 in.)

Pack clearance = Flange moving distance A - 0.11 mm (0.0043 in.)

Pack Clearance:

0.56 to 0.86 mm (0.0220 to 0.0339 in.)

NOTICE:
Install a selective flange {t = 3.4 mm (0.134 in.)} when measuring the moving distance (shaded area in the illustration).

(2) If the pack clearance is outside the specified range, select and install a clutch flange that brings the pack clearance within the specified range.

HINT
There are 11 types of flanges that can be used to adjust the pack clearance. Select the one with the most appropriate thickness.

Flange thickness:

12. INSPECT FORWARD CLUTCH HUB SUB-ASSEMBLY

(a) Using a dial indicator, measure the inside diameter of the forward clutch hub bushing.

Standard inside diameter:

26.037 to 26.062 mm (1.0251 to 1.0261 in.)

(b) If the inside diameter is greater than the standard inside diameter, replace the forward clutch hub.

13. INSPECT NO. 3 CLUTCH DISC

(a) Check whether the sliding surfaces of the 5 discs, the 4 plates, and the flange are worn or burnt.

Standard inside diameter:

35.812 to 35.837 mm (1.4099 to 1.4109 in.)

(b) If the inside diameter is greater than the standard inside diameter, replace the reverse clutch hub.