AUTOMATIC OVERRIDES
For safety, durability, and driveability, some shifts are executed automatically or prevented.
| TYPE OF SHIFT | APPROXIMATE SPEED |
|---|---|
| 4-3 coast downshift | 13 mph |
| 3-2 coast downshift | 9 mph |
| 2-1 coast downshift | 5 mph |
| 1-2 upshift | 6300 engine RPM |
| 2-3 upshift | 6300 engine RPM |
| 4-3 kickdown shift | 13-47 mph w/sufficient throttle |
Automatic shifts will occur under the following conditions
| TYPE OF SHIFT | APPROXIMATE SHIFT POINT |
|---|---|
| 3-4 upshift | Below 15 mph |
| 3-2 downshift | Above 74 mph @ closed throttle or 70 mph otherwise |
| 2-1 downshift | Above 41 mph @ closed throttle or 38 mph otherwise |
Manual shifts are NOT permitted under the following conditions
Scheme 226
| 1 - INPUT SHAFT |
|---|
| 2 - UNDERDRIVE CLUTCH |
| 3 - OVERDRIVE CLUTCH |
| 4 - REVERSE CLUTCH |
| 5 - OVERDRIVE SHAFT |
| 6 - UNDERDRIVE SHAFT |
Three hydraulically applied input clutches are used to drive planetary components. The underdrive, overdrive, and reverse clutches are considered input clutches and are contained within the input clutch assembly input shaft (1), underdrive clutch (2), overdrive clutch (3), reverse clutch (4), overdrive shaft (5) and underdrive shaft (6). The input clutch assembly also contains: (Scheme 226)
- Input shaft
- Input hub
- Clutch retainer
- Underdrive piston
- Overdrive/reverse piston
- Overdrive hub
- Underdrive hub