Page 3825 of 4264
UNIT REPAIR (AW30–40LE) 7A4–17
Disassembly
1. Remove seven bolts fix ing the oil pump to the
transmission case.
Remove the oil pump.
24 1RY 0 000 3
2. Remove race from oil pump.
24 1RY 0 000 2
3. Remove the overdrive planetary gear and overdrive
direct clutch with thrust needle bearing from the
transmission case.
25 2L10 0001
4. Remove the race from OD planetary gear.
25 2L10 0017
Page 3826 of 4264
7A4–18 UNIT REPAIR (AW30–40LE)
5. Remove the overdrive planetary ring gear from the
transmission case.
25 2RY 0 000 2
6. Check piston stroke of overdrive brake
Place a dial indicator onto the overdrive brake
piston as shown in the figure.
25 2RY 0 000 3Measure the stroke applying and releasing the
compressed air (390 – 780 kPa or 57 – 114 psi) as
shown in the figure.
Piston stroke: 1.40 – 1.70 mm (0.0551 – 0.0669 in)
If the values are nonstandard, select another flange.Available flange sizes
24 4RY 0 0001
7. Remove the snap ring.
24 6RY 0 0001
3.3 mm (0.130 in) 3.8 mm (0.150 in)
3.5 mm (0.138 in) 3.9 mm (0.154 in)
3.6 mm (0.142 in) 4.0 mm (0.158 in)
3.7 mm (0.146 in)
Page 3827 of 4264
UNIT REPAIR (AW30–40LE) 7A4–19
8. Remove one flange, four plates and four discs (B–
0).
24 6RY 0 002 6
9. Remove the thrust bearing and two races.
24 7RY 0 000 3
10. Using snap ring pliers, remove the snap ring.
24 6RY 0 0002
11. Remove the OD support.
Remove two bolts fix ing the overdrive support
assembly to the transmission case.
25 2RY 0 0004
Page 3828 of 4264
7A4–20 UNIT REPAIR (AW30–40LE)
Install two removed bolts to the OD support, and
pull out the OD support assembly.
25 2RY 0 000 5
12. Remove the race from OD support.
25 2RY 0 000 6
13. Check piston stroke of second coast brake (B–1)
Place a mark on the second coast brake piston rod
as shown in the figure.
Using feeler gauge, measure the stroke applying
the compressed air (390 – 780 kPa or 57 – 114 psi)
as shown in the figure.
Piston stroke: 1.5 – 3.0 mm (0.059 – 0.118 in)
If the values are nonstandard, replace piston rod
and recheck piston stroke.
If piston stroke is nonstandard, replace brake band.There are two piston rods.
24 8RY 0 0004
24 8RY 0 0005
Rod length 78.4 mm (3.09 in)
79.9 mm (3.15 in)
Page 3829 of 4264
UNIT REPAIR (AW30–40LE) 7A4–21
14. Using snap ring pliers, remove the snap ring.
24 8RY 0 000 6
15. Applying compressed air to the oil hole, remove the
second coast brake piston assembly.
24 8RY 0 000 7
16. Remove the direct clutch and forward clutch from
the transmission case.
24 8RY 0 0008
17. Remove the E-ring from the pin.
Remove the pin from the brake band.
24 8RY 0 0009
Page 3830 of 4264
7A4–22 UNIT REPAIR (AW30–40LE)
18. Remove the second coast brake band from the
transmission case.
24 8RY 0 001 0
19. Remove the front planetary ring gear from the
transmission case.
24 7RY 0 000 4
20. Remove the bearing and race.
24 7RY 0 0005
21. Remove the race.
24 7RY 0 0006
22. Using snap ring pliers, remove the snap ring.
24 8RY 0 0011
Page 3831 of 4264
UNIT REPAIR (AW30–40LE) 7A4–23
NOTE: Hold the output shaft to prevent it from falling.
The output shaft falls when the snap ring is removed.
23. Remove the front planetary gear from the
transmission case.
24 7RY 0 000 7
24. Remove sun gear input drum and one-way clutch.
24 8RY 0 001 2
25. Using two screwdrivers, remove the snap ring.
24 8RY 0 0014
26. Remove, five discs and six plates (B–2).
24 8RY 0 0015
Page 3832 of 4264
7A4–24 UNIT REPAIR (AW30–40LE)
27. Check pack clearance of first and reverse brake (B–
3)
Using a feeler gauge, measure the clearance
between the plate and second brake drum as shown
in the figure.
Clearance: 0.6 – 1.12 mm (0.0236 – 0.0440 in)
If the values are nonstandard, replace the discs.
24 8RY 0 001 6
28. Using snap ring pliers, remove the snap ring.
24 8RY 0 001 7
29. Remove the rear planetary gear, second brake drum
and output shaft as an assembly.
2 47R20 0001
30. Remove the assembled thrust bearing and race
from the transmission case.
24 8RY 0 0018