Automatic Transmission Unit Inspection

Remove the magnets and use them to collect steel particles.

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.

1. Steel (magnetic): bearing, gear and clutch plate wear
   
2. Brass (non-magnetic): bush wear
   

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

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

Text in Illustration

	Lock
	Free

Replace all the 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:

When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

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.)

Maximum inside diameter:

35.887 mm (1.413 in.)

1. If the inside diameter is more than the maximum, replace the reverse clutch hub.
   

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.)

Maximum inside diameter:

26.112 mm (1.028 in.)

1. If the inside diameter is more than the maximum, replace the forward clutch hub.
   

Replace all the 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:

When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

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

Standard free length:

26.74 mm (1.05 in.)

Replace all the 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:

When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

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.)

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.)

Replace all the 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:

When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

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.)

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

Standard clearance:

0.2 to 0.6 mm (0.00787 to 0.0236 in.)

Maximum clearance:

0.65 mm (0.0256 in.)

1. If the clearance is more than the maximum, replace the front planetary gear assembly.
   

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

Maximum inside diameter:

57.48 mm (2.26 in.)

1. If the inside diameter is more than the maximum, replace the front planetary gear.
   

Install the 1-way clutch to the 1-way clutch inner race.

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

Text in Illustration

	Lock
	Free

Remove the 1-way clutch from the 1-way clutch inner race.

Replace all the 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:

When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

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.)

Replace all the 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:

When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

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

Standard free length:

17.45 mm (0.687 in.)

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

Standard clearance:

0.12 to 0.68 mm (0.00472 to 0.0268 in.)

Maximum clearance:

0.73 mm (0.0287 in.)

1. If the clearance is more than the maximum, replace the center planetary gear assembly.
   

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

Text in Illustration

	Lock
	Free

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

Standard inside diameter:

32.176 to 32.201 (1.267 to 1.268 in.)

Maximum inside diameter:

32.251 mm (1.270 in.)

1. If the inside diameter is more than the maximum, replace the rear planetary ring gear.
   

Using a dial indicator, measure the intermediate shaft runout.

Standard runout:

0.03 mm (0.00118 in.)

Maximum runout:

0.08 mm (0.00315 in.)

Using a micrometer, measure the 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.)

Minimum diameter:

A, B:

25.912 mm (1.02 in.)

C, D:

32.012 mm (1.26 in.)

Replace all the 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:

When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

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

Standard clearance:

0.2 to 0.6 mm (0.00787 to 0.0236 in.)

Maximum clearance:

0.65 mm (0.0256 in.)

1. If the clearance is more than the maximum, replace the planetary gear assembly.
   

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

Maximum inside diameter:

20.075 mm (0.790 in.)

1. If the inside diameter is more than the maximum, replace the rear planetary gear assembly.
   

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.)

Make sure the 1st and reverse brake piston moves smoothly when applying compressed air into and releasing compressed air from the transmission case.

Make sure the No. 1 brake piston moves smoothly when applying compressed air into and releasing compressed air from the transmission case.

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

HINT:

When inspecting the O/D direct clutch, check with the C3 accumulator piston hole closed.

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

1. No. 2 clutch (C2)
   
2. No. 3 clutch (C3)
   
3. No. 1 clutch (C1)
   
4. No. 3 brake (B3)
   
5. No. 1 brake (B1)
   
6. No. 2 brake (B2)
   
7. No. 4 brake (B4)