Illustration 1 | g01007675 |
(1) Input shaft (2) Gear (3) Gear (4) Fan drive shaft (5) Gear (6) Pump drive shaft (7) Input drive gear (8) Forward/Reverse shaft (9) Forward primary gear (10) Reverse primary gear (11) Gear (12) Reverse idler shaft (13) Gear (14) Fourth gear (countershaft) (15) Countershaft (16) First gear (countershaft) (17) Second gear (countershaft) (18) Third gear (countershaft) (19) Fifth gear (countershaft) (20) First gear (output shaft) (21) Second gear (output shaft) (22) Third gear (output shaft) (23) Fourth gear (output shaft) (24) Fifth gear (output shaft) (25) Output shaft (F) Forward clutch (R) Reverse clutch (X) Synchronizer for the first speed and second speed (Y) Synchronizer for the third speed and fourth speed (Z) Synchronizer for the fifth speed |
Table 1 and Table 2 show the engagements of the clutches and the synchronizers for different speed selections.
FORWARD DIRECTION     | |
Selected Speed     | Engaged Clutches and Synchronizers     |
Neutral     | None     |
First Speed Forward     | Forward clutch (F) and synchronizer (X) with first gear (20)     |
Second Speed Forward     | Forward clutch (F) and synchronizer (X) with second gear (21)     |
Third Speed Forward     | Forward clutch (F) and synchronizer (Y) with third gear (22)     |
Fourth Speed Forward (1)     | Forward clutch (F) and synchronizer (Y) with fourth gear (23)     |
Fifth Speed Forward (if equipped) (1)     | Forward clutch (F) and synchronizer (Z) with fifth gear (19)     |
( 1 ) | Forward direction only |
REVERSE DIRECTION     | |
Selected Speed     | Engaged Clutches and Synchronizers     |
Neutral     | None     |
First Speed Reverse     | Reverse clutch (R) and synchronizer (X) with first gear (20)     |
Second Speed Reverse     | Reverse clutch (R) and synchronizer (X) with second gear (21)     |
Third Speed Reverse     | Reverse clutch (R) and synchronizer (Y) with third gear (22)     |
Fourth Speed Reverse (Power Shuttle Transmission )     | Reverse clutch (R) and synchronizer (Y) with third gear (23)     |
Examples of Power Flow Through the Transmission
First Speed Forward
Illustration 2 | g00886981 |
When first speed forward is selected, synchronizer (X) locks first gear (20) to output shaft (25). Also, forward clutch (F) is hydraulically actuated in order to lock forward primary gear (9) to forward/reverse shaft (8) .
Power will flow through components in the following order:
- Input shaft (1)
- Gear (2)
- Gear (3)
- Gear (5)
- Input drive gear (7)
- Forward/Reverse shaft (8)
- Forward clutch (F)
- Forward primary gear (9)
- Fourth gear (countershaft) (14)
- Countershaft (15)
- First gear (countershaft) (16)
- First gear (output shaft) (20)
- Synchronizer (X)
- Output shaft (25)
Second Speed Reverse
Illustration 3 | g00886984 |
When second speed reverse is selected, synchronizer (X) locks second gear (21) to output shaft (25). Also, reverse clutch (R) is hydraulically actuated in order to lock reverse primary gear (10) to forward/reverse shaft (8) .
Power will flow through components in the following order:
- Input shaft (1)
- Gear (2)
- Gear (3)
- Gear (5)
- Input drive gear (7)
- Forward/Reverse shaft (8)
- Reverse clutch (R)
- Reverse primary gear (10)
- Gear (11)
- Reverse idler shaft (12)
- Gear (13)
- Fourth gear (countershaft) (14)
- Countershaft (15)
- Second gear (countershaft) (17)
- Second gear (output shaft) (21)
- Synchronizer (X)
- Output shaft (25)
Fifth Speed Forward (If Equipped)
Illustration 4 | g00886983 |
When fifth speed forward is selected, synchronizer (Z) locks fifth gear (19) to countershaft (15). Also, forward clutch (F) is hydraulically actuated in order to lock forward primary gear (9) to forward/reverse shaft (8) .
Power will flow through components in the following order:
- Input shaft (1)
- Gear (2)
- Gear (3)
- Gear (5)
- Input drive gear (7)
- Forward/Reverse shaft (8)
- Forward clutch (F)
- Forward primary gear (9)
- Fourth gear (countershaft) (14)
- Countershaft (15)
- Synchronizer (Z)
- Fifth gear (countershaft) (19)
- Fifth gear (output shaft) (24)
- Output shaft (25)