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): bushing 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 (0.619 in.)

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

Standard clearance:

0.2 to 0.60 mm (0.008 to 0.024 in.)

Maximum clearance:

0.65 mm (0.026 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 (2.263 in.)

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

Hold the 1-way clutch inner race and turn the 1-way clutch.

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

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 (0.671 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 (0.687 in.)

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

Standard clearance:

0.12 to 0.68 mm (0.005 to 0.027 in.)

Maximum clearance:

0.73 mm (0.029 in.)

1. If the clearance is greater 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 counterclockwise and locks when turned clockwise.

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

Maximum inside diameter:

32.175 mm (1.267 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 (0.003 in.)

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

Standard diameter:

Position	Specified Condition
A	25.962 to 25.975 mm (1.022 to 1.023 in.)
B	25.962 to 25.975 mm (1.022 to 1.023 in.)
C	32.062 to 32.075 mm (1.262 to 1.263 in.)
D	32.062 to 32.075 mm (1.262 to 1.263 in.)

Minimum diameter:

Position	Specified Condition
A	25.912 mm (1.020 in.)
B	25.912 mm (1.020 in.)
C	32.012 mm (1.260 in.)
D	32.012 mm (1.260 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 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 (0.026 in.)

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

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

Maximum inside diameter:

20.075 mm (0.790 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 (0.935 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, disassemble 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)