Automatic Transmission Unit Inspection

Using a cylinder gauge, measure the inside diameter of the extension housing bush.

Maximum inside diameter:

40.02 mm (1.58 in.)

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.
   

Place SST and a dial indicator onto the overdrive brake piston.

SST

09350-30020(09350-06120)

Measure the stroke while applying and releasing compressed air (392 kPa (4.0 kgf/cm², 57 psi)).

Standard piston stroke:

1.75 to 2.05 mm (0.0689 to 0.0807 in.)

HINT:

1. If the piston stroke is still outside the standard, select another flange.
   
2. There are 7 different thicknesses for the flange.
   

Standard Flange Thickness:

No.	Specified Condition	No.	Specified Condition
77	3.3 mm (0.130 in.)	81	3.8 mm (0.150 in.)
78	3.5 mm (0.138 in.)	82	3.9 mm (0.154 in.)
79	3.6 mm (0.142 in.)	83	4.0 mm (0.157 in.)
80	3.7 mm (0.146 in.)	-	-

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

Maximum inside diameter:

24.65 mm (0.971 in.)

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

Standard clearance:

0.20 to 0.60 mm (0.00787 to 0.0236 in.)

Maximum clearance:

0.65 mm (0.0256 in.)

Using a feeler gauge, measure the clearance between the plate and 2nd brake drum.

Standard clearance:

0.70 to 1.22 mm (0.0276 to 0.0480 in.)

HINT:

1. If the clearance is not as specified, select another flange.
   
2. There are 8 different thicknesses for the flange.
   

Standard Flange Thickness:

No.	Specified Condition	No.	Specified Condition
67	5.4 mm (0.213 in.)	52	4.6 mm (0.181 in.)
66	5.2 mm (0.205 in.)	53	4.4 mm (0.173 in.)
50	5.0 mm (0.197 in.)	54	4.2 mm (0.165 in.)
51	4.8 mm (0.189 in.)	55	4.0 mm (0.157 in.)

Using a feeler gauge, measure the clearance between the snap ring and flange.

Standard clearance:

0.62 to 1.98 mm (0.0244 to 0.0780 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:

12.9 mm (0.508 in.)

Using a cylinder gauge, measure the inside diameter of the transmission case rear bush.

Maximum inside diameter:

38.19 mm (1.50 in.)

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

Place a mark on the 2nd coast brake piston rod.

Using SST, measure the stroke while applying and releasing compressed air (392 kPa (4.0 kgf/cm², 57 psi)).

SST

09240-00020

Standard piston stroke:

1.5 to 3.0 mm (0.0591 to 0.118 in.)

Using a dial indicator, measure the end play of the output shaft with hand.

Standard end play:

0.30 to 1.04 mm (0.0118 to 0.0409 in.)

Check that the output shaft rotates smoothly.

Make sure the input shaft rotates smoothly.

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

HINT:

When inspecting the overdrive direct clutch, check with the C-0 accumulator piston hole closed.

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

1. Overdrive direct clutch (C1)
   

2. Direct clutch (C2)
   

3. Forward clutch (C3)
   

4. Overdrive brake (B1)
   

5. 2nd coast brake (B2)
   

6. 2nd brake (B3)
   

7. 1st and reverse brake (B4)