A Clutch
Overview
| Item | Description |
|---|---|
| 1 | SSA |
| 2 | A clutch control valve |
| 3 | A clutch latch valve |
| 4 | A clutch apply circuit |
| 5 | A clutch piston |
| 6 | A clutch assembly |
| 7 | Ring gear No. 1 |
Ring gear No. 1 is connected to the A clutch. When the A clutch applies, it holds the ring gear No. 1 stationary.
A Clutch Exploded View
| Item | Description |
|---|---|
| 1 | Front support assembly |
| 2 | A clutch piston |
| 3 | A clutch piston return spring |
| 4 | A clutch wave spring |
| 5 | A clutch apply plate |
| 6 | A clutch steel plates |
| 7 | A clutch friction plates |
| 8 | A clutch separating springs |
| 9 | A clutch pressure plate |
| 10 | Ring gear No. 1 |
| 11 | Transmission case |
A Clutch Hydraulic Circuits
| Item | Description |
|---|---|
| 1 | Line pressure |
| 2 | Pump output |
| 3 | A clutch control valve |
| 4 | SSA |
| 5 | Control pressure to latch valve |
| 6 | A clutch latch valve |
| 7 | Apply pressure to mechanical A clutch |
| 8 | Mechanical A clutch |
| 9 | Elevated exhaust pressure |
| 10 | Clutch exhaust |
A Clutch Hydraulic Operation
Line pressure is supplied to the A clutch control valve and the A clutch latch valve. As SSA turns on, it moves the control valve allowing regulated line pressure to flow to the A clutch latch valve and then to the mechanical A clutch. When the regulated line pressure in the A clutch control circuit reaches approximately 698 kPa (100 psi), the mechanical A clutch is fully applied. The pressure in the A clutch control circuit moves the A clutch latch valve to the left which allows line pressure to hold the mechanical A clutch applied.
A Clutch Hydraulic Passages