4th Gear
4th Gear Clutch Application Chart
| Gear | A Clutch (1, 2, 3, 4, 5) | B Clutch (4, 6, R) | C Clutch (3, 7) | One-Way Clutch (1)Hydraulic Selectable One-Way Clutch (SOWC) | E Clutch (5, 6, 7, 8) | F Clutch (2, 8) | |
|---|---|---|---|---|---|---|---|
| 4th Gear D | H | H | |||||
| Planetary components | Output sun | Reaction sun | Overdrive sun | Overdrive/reaction input ring gear | Input ring gear | Overdrive sun | |
H = Holding
O/R = Over Running
4th Gear Solenoid Operation Chart
| Base Selector Lever Position | PCM Commanded Gear | SSA (1, 2, 3, 4, 5) | SSB (4, 6, R) | SSC (3, 7) | One-Way Clutch (1) | SSD (R, 1) | SSE (5, 6, 7, 8) | SSF (2, 8) |
|---|---|---|---|---|---|---|---|---|
| D | 4 | On | On | Off | O/R | Off | Off | Off |
Powerflow
| Item | Description |
|---|---|
| 1 | Output planetary |
| 2 | Input planetary |
| 3 | Reaction planetary |
| 4 | Overdrive planetary |
| 5 | E (5, 6, 7, 8) clutch |
| 6 | B (4, 6, R) clutch |
| 7 | C (3, 7) clutch |
| 8 | F (2, 8) clutch |
| 9 | One-Way Clutch (OWC) |
| 10 | Hydraulic SOWC |
| 11 | A (1, 2, 3, 4, 5) clutch |
| 12 | 520 rpm |
| 13 | 525 rpm |
| 14 | 1000 rpm |
| 15 | Held components |
| 16 | Driven components |
| 17 | 520 rpm |
| 18 | 751 rpm |
4th Gear Position
| Item | Description |
|---|---|
| 1 | Held components |
| 2 | Driven components |
| 3 | B (4, 6, R) clutch |
| 4 | A (1, 2, 3, 4, 5) clutch |
- In fourth gear, the A (1, 2, 3, 4, 5) clutch holds the output sun gear stationary.
- The B (4, 6, R) clutch holds the reaction sun gear at turbine shaft speed (1000 rpm).
- The turbine shaft and input sun rotate at 1000 rpm.
- The input ring rotates at 525 rpm.
- The input carrier and output ring rotate at 751 rpm.
- The output carrier rotates at 520 rpm or a 1.923:1 ratio.