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 No. 2 1-way clutch assembly

Check that the No. 2 1-way clutch assembly turns freely clockwise and locks when turned counterclockwise.

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) 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.

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

Standard free length:

15.72 mm (0.6189 in.)

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

Standard clearance:

0.2 to 0.60 mm (0.008 to 0.0236 in.)

Maximum clearance:

0.65 mm (0.0256 in.)

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

Using a dial indicator, measure the inside diameter of the front planetary gear bushing.

Maximum inside diameter:

57.48 mm (2.2630 in.)

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

Install the 1-way clutch assembly 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 assembly turns freely counterclockwise and locks when turned clockwise.

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

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) 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.

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

Standard free length:

17.05 mm (0.6712 in.)

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) 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.

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

Standard free length:

17.45 mm (0.6870 in.)

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

Standard clearance:

0.12 to 0.68 mm (0.0047 to 0.0268 in.)

Maximum clearance:

0.73 mm (0.0287 in.)

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

Hold the rear planetary ring gear flange sub-assembly turn the 1-way clutch assembly.

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

Using a caliper gauge, measure the inside diameter of the rear planetary ring gear bushing.

Maximum inside diameter:

32.18 mm (1.2669 in.)

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

Using a dial indicator, check the intermediate shaft runout.

Maximum runout:

0.08 mm (0.0031 in.)

NOTICE:

If the bend exceeds the specification, replace the intermediate shaft with a new one.

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

Standard diameter:

A:

25.96 to 25.98 mm (1.0220 to 1.0228 in.)

B:

25.96 to 25.98 mm (1.0220 to 1.0228 in.)

C:

32.06 to 32.08 mm (1.2622 to 1.2630 in.)

D:

32.06 to 32.08 mm (1.2622 to 1.2630 in.)

Minimum diameter:

A:

25.91 mm (1.0201 in.)

B:

25.91 mm (1.0201in.)

C:

32.01 mm (1.2602 in.)

D:

32.01 mm (1.2602 in.)

NOTICE:

If the outer diameter is outside the standard or less than the minimum, replace the intermediate shaft with the new one.

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) 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.

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

Standard clearance:

0.2 to 0.6 mm (0.008 to 0.024 in.)

Maximum clearance:

0.65 mm (0.0256 in.)

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

Using a caliper gauge, measure the inside diameter of the rear planetary gear bushing.

Maximum inside diameter:

20.08 mm (0.7905 in.)

1. If the inside diameter is greater 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 (0.9346 in.)

Make sure the 1st and reverse brake pistons move smoothly when applying and releasing the compressed air into the transmission case.

Make sure the No. 1 brake piston moves smoothly when applying and releasing the compressed air into 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 holes indicated in the illustration.

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

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