Compatible Unit Serial Number : 7001 and up
STRUCTURE, FUNCTION
AND MAINTENANCE STANDARTforPOWER TRAIN (Part 1.3)
AND MAINTENANCE STANDART
Transmission
A: Speed sensor (for input shaft speed)
B: Speed sensor (for intermediate shaft speed)
C: Speed sensor (for output shaft speed)
D: From sub-tank
E: Torque converter intermediate oil pressure sensor
F: To pump (suction)
G: From torque converter (lubrication circuit)
H: From torque converter (main circuit)
J: From torque converter (drain circuit)
K: To lockup clutch
L: Lubricating oil temperature sensor
M: From oil cooler
N: Lubricating oil pressure pickup port
P: To breather
Q: To torque converter valve
(To pilot circuit of main flow rate selector valve
and main oil pressure selector valve)
R: Lubrication relief valve
1. Transmission input shaft
2. Transmission control valve
3. Transmission output shaft
4. Strainer
5. Drain valve
6. Lubricating oil amount selector valve
1. Transmission input shaft
2. H sun gear (Number of teeth: 34)
3. H hub
4. H clutch
5. H planetary pinion (Number of teeth: 32)
6. H carrier
7. L ring gear (hub)
8. L clutch
9. H ring gear (Number of teeth: 98)
10. L clutch housing
11. 4th clutch housing
12. 4th clutch drum
13. 4th clutch
14. 4th hub
15. 3rd planetary pinion (Number of teeth: 20)
16. 3rd clutch
17. 3rd ring gear (Number of teeth: 86)
18. 3rd sun gear (Number of teeth: 46)
19. R clutch
20. R planetary pinion (Number of teeth: 20)
21. R sun gear (Number of teeth: 58)
22. R ring gear (Number of teeth: 98)
23. 2nd clutch
24. 2nd ring gear (Number of teeth: 98, 97)
25. 2nd planetary pinion (Number of teeth: 28)
26. 2nd sun gear (Number of teeth: 42)
27. 1st, 2nd carrier
28. 1st clutch
29. 1st ring gear (Number of teeth: 85)
30. Transmission output shaft
31. 1st planetary pinion (Number of teeth: 31)
32. 1st clutch piston
33. 2nd clutch piston
34. Intermediate shaft (1st sun gear’s number of teeth: 23)
35. R clutch piston
36. 3rd carrier
37. 4th clutch piston
38. L clutch piston
39. H clutch piston
40. 3rd clutch piston
41. R carrier
42. Hub
Outline
- The transmission employed consists of the unit planetary mechanism and disc clutch that provides "7 forward gear speeds and 2 reverse gear speeds".
- Among the 7 sets of planetary gear system and disc clutches of the transmission, 2 clutches are fixed hydraulically with the ECMV to select 1 rotating direction and gear speed.
- The transmission transmits the power being transmitted to the transmission input shaft to the output shaft after selecting a single speed in the range of the 1st - 7th speed in the forward and the L - H speed in the reverse travel. In this case, the gear speed change is done through the combination of H and L clutches, 4 speed clutches and R clutch.
Number of plates and discs used
Clutch No. |
Number of Plates |
Number of Discs |
H Clutch |
4 |
5 |
L Clutch |
4 |
5 |
4th Clutch |
3 |
4 |
3rd Clutch |
3 |
4 |
2nd Clutch |
5 |
5 |
1st Clutch |
5 |
5 |
R Clutch |
5 |
5 |
Combinations of clutches at respective gear speeds and reduction ratio
Gear Speed |
Clutch Speed |
Reduction Rasio |
Forward 1st |
L x 1st |
4.696 |
Forward 2nd |
L x 2nd |
3.333 |
Forward 3rd |
H x 2nd |
2.475 |
Forward 4th |
L x 3rd |
1.838 |
Forward 5th |
H x 3rd |
1.365 |
Forward 6th |
L x 4th |
1.000 |
Forward 7th |
H x 4th |
0.742 |
Reverse L |
L x R |
5.244 |
Reverse H |
H x R |
3.894 |
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