Transmission Unit

A760F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION UNIT: INSPECTION

1. INSPECT AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY

(a) Remove the magnets and use them to collect steel particles.

(b) Carefully look at the foreign matter and particles in the pan and on the magnets to anticipate the type of wear you will find in the transmission.

* Steel (magnetic): bearing, gear and clutch plate wear

* Brass (non-magnetic): bush wear

2. INSPECT NO. 2 1-WAY CLUTCH ASSEMBLY

(a) Hold the reverse clutch hub and turn the 1-way clutch assembly.

(b) Check that the 1-way clutch turns freely clockwise and locks when turned counterclockwise.

Text in Illustration

If there is a problem with the 1-way clutch, replace the No. 2 1-way clutch assembly.

3. INSPECT REAR CLUTCH DISC

(a) Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) the grooves or printed numbers have even a little bit of damage.

NOTICE:
Before assembling new discs, soak them in ATF for at least 15 minutes.

4. INSPECT REVERSE CLUTCH HUB SUB-ASSEMBLY

(a) Using a dial indicator, measure the inside diameter of the reverse clutch hub bush.

Standard inside diameter:

35.812 to 35.837 mm (1.410 to 1.411 in.)

* If the inside diameter is not as specified, replace the reverse clutch hub.

5. INSPECT FORWARD CLUTCH HUB SUB-ASSEMBLY

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

Standard inside diameter:

26.037 to 26.062 mm (1.025 to 1.026 in.)

* If the inside diameter is not as specified, replace the forward clutch hub.

6. INSPECT UNDERDRIVE 1-WAY CLUTCH ASSEMBLY

(a) Hold the coast clutch hub and turn the 1-way clutch assembly. Check that the 1-way clutch turns freely clockwise and locks when turned counterclockwise.

Text in Illustration

If there is a problem with the 1-way clutch, replace the underdrive 1-way clutch assembly.

7. INSPECT FORWARD MULTIPLE DISC CLUTCH DISC

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

Standard free length:

24.64 mm (0.970 in.)

If the free length is less than the standard, replace the forward clutch return spring sub-assembly.

10. INSPECT DIRECT CLUTCH DISC

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

Standard free length:

21.04 mm (0.828 in.)

If the free length is less than the standard, replace the reverse clutch return spring sub-assembly.

12. INSPECT DIRECT CLUTCH RETURN SPRING SUB-ASSEMBLY

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

Standard free length:

19.51 mm (0.768 in.)

If the free length is less than the standard, replace the direct clutch return spring sub-assembly.

13. INSPECT NO. 3 BRAKE DISC

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

Standard free length:

15.72 mm (0.619 in.)

If the free length is less than the standard, replace the No. 3 brake piston return spring sub-assembly.

15. INSPECT FRONT PLANETARY GEAR ASSEMBLY

(a) Using a feeler gauge, measure the front planetary pinion gear thrust clearance.

Standard clearance:

0.2 to 0.60 mm (0.00787 to 0.0236 in.)

* If the clearance is not as specified, replace the front planetary gear assembly.

(b) Using a cylinder gauge, measure the inside diameter of the front planetary gear bush.

Standard inside diameter:

57.405 to 57.43 mm (2.260 to 2.261 in.)

* If the inside diameter is not as specified, replace the front planetary gear.

16. INSPECT 1-WAY CLUTCH ASSEMBLY

(a) Install the 1-way clutch to the 1-way clutch inner race.

(b) Hold the 1-way clutch inner race and turn the 1-way clutch assembly. Check that the 1-way clutch turns freely counterclockwise and locks when turned clockwise.

Text in Illustration

If there is a problem with the 1-way clutch, replace the 1-way clutch assembly.

(c) Remove the 1-way clutch from the 1-way clutch inner race.

17. INSPECT NO. 1 BRAKE DISC

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

Standard free length:

17.05 mm (0.671 in.)

If the free length is less than the standard, replace the brake piston return spring sub-assembly.

19. INSPECT NO. 2 BRAKE DISC

(a) Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) the grooves or printed numbers have even a little bit of damage.

NOTICE:
Before assembling new discs, soak them in ATF for at least 15 minutes.

20. INSPECT NO. 2 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY

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

Standard free length:

22.66 mm (0.892 in.)

If the free length is less than the standard, replace the No. 2 brake piston return spring sub-assembly.

21. INSPECT CENTER PLANETARY GEAR ASSEMBLY

(a) Using a feeler gauge, measure the center planetary gear pinion thrust clearance.

Standard clearance:

0.12 to 0.68 mm (0.00472 to 0.0268 in.)

* If the clearance is not as specified, replace the center planetary gear assembly.

22. INSPECT NO. 3 1-WAY CLUTCH ASSEMBLY

(a) Hold the rear planetary ring gear flange and turn the 1-way clutch. Check that the 1-way clutch turns freely counterclockwise and locks when turned clockwise.

Text in Illustration

If there is a problem with the 1-way clutch, replace the No. 3 1-way clutch assembly.

23. INSPECT REAR PLANETARY RING GEAR FLANGE SUB-ASSEMBLY

(a) Using a dial indicator, measure the inside diameter of the rear planetary ring gear bush.

Standard inside diameter:

32.176 to 32.201 mm (1.267 to 1.268 in.)

* If the inside diameter is not as specified, replace the rear planetary ring gear.

24. INSPECT INTERMEDIATE SHAFT

(a) Using a dial indicator, measure the intermediate shaft runout.

Maximum runout:

0.08 mm (0.00315 in.)

If the runout is not as specified, replace the intermediate shaft with a new one.

(b) Using a micrometer, check the outer diameter of the intermediate shaft at the positions shown in the diagram.

Standard diameter:

A, B
25.962 to 25.975 mm (1.022 to 1.023 in.)

C, D
32.062 to 32.075 mm (1.262 to 1.263 in.)

If the outer diameter is not as specified, replace the intermediate shaft with a new one.

25. INSPECT NO. 4 BRAKE DISC

(a) Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) the grooves or printed numbers have even a little bit of damage.

NOTICE:
Before assembling new discs, soak them in ATF for at least 15 minutes.

26. INSPECT REAR PLANETARY GEAR ASSEMBLY

(a) Using a feeler gauge, measure the rear planetary gear pinion thrust clearance.

Standard clearance:

0.2 to 0.6 mm (0.00787 to 0.0236 in.)

* If the clearance is not as specified, replace the planetary gear assembly.

(b) Using a dial indicator, measure the inside diameter of the rear planetary gear bush.

Standard inside diameter:

20.0 to 20.025 mm (0.787 to 0.788 in.)

* If the inside diameter is not as specified, replace the rear planetary gear assembly.

27. INSPECT 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY

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

Standard free length:

23.74 mm (0.935 in.)

If the free length is less than the standard, replace the 1st and reverse brake return spring sub-assembly.

28. INSPECT INDIVIDUAL PISTON OPERATION

(a) Check the operating sound while applying compressed air into the oil holes indicated in the illustration.

HINT
When inspecting the rear clutch, check the operating sound with the C3 accumulator piston hole closed.

If there is no sound, disassemble and check the installation condition of the parts.

(1) Forward multiple disc clutch (C1)

(2) Direct clutch (C2)

(3) Rear clutch (C3)

(4) Coast clutch (C4)

(5) No. 1 brake (B1)

(6) No. 2 brake (B2)

(7) No. 3 brake (B3)

(8) No. 4 brake (B4)