Transmission Unit

AA80E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION UNIT: INSPECTION

1. INSPECT NO. 1 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) grooves or printed numbers have even minimal damage.





NOTICE:
Before assembling new discs, soak them in ATF for at least 2 hours.

2. INSPECT FRONT PLANETARY GEAR ASSEMBLY

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





Standard clearance:

0.2 to 0.6 mm (0.008 to 0.024 in.)

(a) If the clearance is not as specified, replace the front planetary gear assembly.

3. INSPECT OVERDRIVE 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) grooves or printed numbers have even minimal damage.





NOTICE:
Before assembling new discs, soak them in ATF for at least 2 hours.

4. INSPECT REVERSE 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) grooves or printed numbers have even minimal damage.





NOTICE:
Before assembling new discs, soak them in ATF for at least 2 hours.

5. INSPECT REVERSE 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:

22.21 mm (0.8744 in.)

(a) If the free length is shorter than the standard free length, replace the reverse clutch return spring sub-assembly.

6. INSPECT OVERDRIVE 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:

21.09 mm (0.8303 in.)

(a) If the free length is shorter than the standard free length, replace the overdrive clutch return spring sub-assembly.

7. INSPECT OVERDRIVE DIRECT CLUTCH DRUM SUB-ASSEMBLY

(a) Using a caliper gauge, measure the inside diameter of the overdrive direct clutch drum bush.





Standard inside diameter (Front side):

67.40 to 67.44 mm (2.6535 to 2.6551 in.)

Standard inside diameter (Rear side):

55.62 to 55.64 mm (2.1898 to 2.1905 in.)

(a) If the inside diameter is not as specified, replace the overdrive direct clutch drum sub-assembly.

8. INSPECT FORWARD MULTIPLE 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) grooves or printed numbers have even minimal damage.





NOTICE:
Before assembling new discs, soak them in ATF for at least 2 hours.

9. INSPECT FORWARD 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:

20.82 mm (0.8197 in.)

(a) If the free length is shorter than the standard free length, replace the forward clutch return spring sub-assembly.

10. INSPECT FORWARD CLUTCH DRUM SUB-ASSEMBLY

(a) Using a caliper gauge, measure the inside diameter of the forward clutch drum bush.





Standard inside diameter:

33.200 to 33.225 mm (1.3071 to 1.3081 in.)

(a) If the inside diameter is not as specified, replace the forward clutch drum sub-assembly.

11. INSPECT SUN GEAR INPUT DRUM SUB-ASSEMBLY

(a) Using a caliper gauge, measure the inside diameter of the sun gear input drum bush.





Standard inside diameter:

45.075 to 45.100 mm (1.7746 to 1.7756 in.)

(a) If the inside diameter is not as specified, replace the sun gear input drum sub-assembly.

12. INSPECT REAR PLANETARY SUN GEAR ASSEMBLY

(a) Using a caliper gauge, measure the inside diameter of the rear planetary sun gear bush.





Standard inside diameter:

28.700 to 28.721 mm (1.1299 to 1.1307 in.)

(a) If the inside diameter is not as specified, replace the rear planetary sun gear assembly.

13. INSPECT REAR PLANETARY GEAR ASSEMBLY

(a) Using a feeler gauge, measure the long and short thrust clearances of the rear planetary gear pinion.





Standard clearance:

0.2 to 0.6 mm (0.008 to 0.024 in.)

(a) If the clearance is not as specified, replace the rear planetary gear assembly.

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





Standard inside diameter (Front side):

71.60 to 71.63 mm (2.8189 to 2.8201 in.)

Standard inside diameter (Rear side):

28.700 to 28.721 mm (1.1299 to 1.1307 in.)

(b) If the inside diameter is not as specified, replace the rear planetary gear assembly.

14. INSPECT NO. 1 ONE-WAY CLUTCH

(a) Set the one-way clutch onto the rear planetary gear.





(b) Hold the rear planetary gear assembly and turn the one-way clutch.

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

If there is a problem with the No. 1 one-way clutch, replace it.

15. 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) grooves or printed numbers have even minimal damage.





NOTICE:
Before assembling new discs, soak them in ATF for at least 2 hours.

16. INSPECT NO. 2 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) grooves or printed numbers have even minimal damage.





NOTICE:
Before assembling new discs, soak them in ATF for at least 2 hours.

17. 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:

20.76 mm (0.8173 in.)

(a) If the free length is shorter than the standard free length, replace the direct clutch return spring sub-assembly.

18. 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:

23.36 mm (0.9197 in.)

(a) If the free length is shorter than the standard free length, replace the No. 2 brake piston return spring sub-assembly.

19. INSPECT AUTOMATIC TRANSMISSION CASE SUB-ASSEMBLY

(a) Using a caliper gauge, measure the inside diameter of the automatic transmission case sleeve bush.





Standard inside diameter:

49.07 to 49.155 mm (1.9319 to 1.9352 in.)

(a) If the inside diameter is not as specified, replace the automatic transmission case sub-assembly.