POWERTRAIN OPERATION [GF4AX-EL]

BUE051700000N07

Component Parts And Their Movement

Symbol

Component part

Movement

C1
Forward clutch
• Transmits reverse forward drum rotation to small sun gear
C2
Coasting clutch
• Transmits reverse forward drum rotation to small sun gear
(Accordingly, provides engine braking)
C3
3-4 clutch
• Transmits 3-4 clutch drum rotation to planetary carrier
C4
Reverse clutch
• Transmits reverse forward drum rotation to large sun gear
B1
2-4 brake band
• Locks 2-4 brake drum and large sun gear rotation
B2
Low and reverse brake
• Locks low and reverse brake hub rotation
OWC1
One-way clutch 1
• Transmits reverse forward drum rotation to small sun gear only when driven
OWC2
One-way clutch 2
• Locks planetary carrier rightward rotation
-
Planetary gear
• Converts driving force transmitted by operation of brakes and clutches, and transmits force to output gear
(Performs shifting function)

Note
• Rotations are described as viewed from the oil pump side.

Power Flow

1GR

1
Input
2
Forward clutch
3
One-way clutch 1
4
Large sun gear
5
Small sun gear
6
Short pinion gear
7
Long pinion gear
8
One-way clutch 2
9
Internal gear
10
Output gear
11
Output

2GR

1
Input
2
Forward clutch
3
One-way clutch 1
4
2-4 brake band
5
Small sun gear
6
Short pinion gear
7
Long pinion gear
8
Internal gear
9
Output gear
10
Output

3GR

1
Input
2
Forward clutch
3
One-way clutch 1
4
Coasting clutch
5
Large sun gear
6
Small sun gear
7
Internal gear
8
3-4 clutch
9
Output gear
10
Output

4GR

1
Input
2
Forward clutch
3
One-way clutch 1
4
2-4 brake band
5
Small sun gear
6
Short pinion gear
7
Long pinion gear
8
3-4 clutch
9
Internal gear
10
Output gear
11
Output

R position

1
Input
2
Reverse clutch
3
Large sun gear
4
Small sun gear
5
Short pinion gear
6
Long pinion gear
7
Low and reverse brake
8
Internal gear
9
Output gear
10
Output