Low Reverse Clutch Assembly
Low/Reverse Clutch Assembly
Low/Reverse (1, R) Clutch Cutaway View
| Item | Description |
|---|---|
| 1 | Low/reverse (1, R) clutch assembly |
| 2 | Rear planetary assembly carrier |
| 3 | Low/reverse (1, R) clutch cylinder |
Low/Reverse (1, R) Clutch Mechanical Operation
The low/reverse (1, R) clutch holds the rear planetary carrier stationary to the transmission case. The low/reverse (1, R) clutch is applied in PARK, REVERSE, NEUTRAL, manual 1st gear and DRIVE 1st gear, below 8 kph (5 mph).
Low/Reverse (1, R) Clutch Exploded View
| Item | Description |
|---|---|
| 1 | Low One-Way Clutch (OWC)/ low/reverse (1, R) clutch pressure plate |
| 2 | Low/reverse (1, R) clutch frictions |
| 3 | Low/reverse (1, R) clutch steel plates |
| 4 | Low/reverse (1, R) clutch apply plate |
| 5 | Low/reverse (1, R) clutch wave spring |
| 6 | Low/reverse (1, R) clutch return spring |
| 7 | Low/reverse (1, R) clutch piston |
| 8 | Low/reverse (1, R) clutch cylinder |
Low/Reverse (1, R) Clutch Hydraulic Circuits (Applied in Reverse)
To apply the low/reverse (1, R) clutch, the manual valve can be in any position. Line pressure is supplied by the pump to the low/reverse (1, R) clutch regulator and latch valves through the LP circuit. The low/reverse (1, R) clutch has 2 application circuits, CBLRS (static apply) and CBLRD (dynamic apply). The static apply circuit is supplied line pressure through the low/reverse latch valve. The dynamic apply circuit is supplied regulated line pressure from the low/reverse regulator valve. For the low/reverse (1, R) clutch to apply in REVERSE, the manual valve provides line pressure to the direct (3, 5, R) clutch latch valve through the R hydraulic circuit. With the direct (3, 5, R) clutch latch valve in position to apply the direct (3, 5, R) clutch, it opens the R hydraulic circuit to the PC4R circuit. When the low/reverse (1, R) clutch latch valve moves, it opens the LP hydraulic circuit to the CBLRS circuit for static application of the low/reverse (1, R) clutch. As the low/reverse (1, R) clutch regulator valve moves, it opens the LP hydraulic circuit to the CBLRD circuit to supply regulated line pressure for dynamic application of the low/reverse (1, R) clutch. The low/reverse (1, R) clutch latch valve directs regulated line pressure from the CBLRD hydraulic circuit to the opposite side of the low/reverse (1, R) clutch regulator valve through the CBLRFB circuit for controlled low/reverse (1, R) clutch engagement.
Low/Reverse (1, R) Clutch Hydraulic Circuit Diagram (Applied in Reverse)
Low/Reverse (1, R) Clutch Hydraulic Circuits (Applied in Park, Neutral or Manual 1st)
For the low/reverse (1, R) clutch to apply in PARK, NEUTRAL or manual 1st gear position, the operation is basically the same as in REVERSE except the PC4R circuit is supplied from a different circuit. SSD provides regulated solenoid pressure from the SF hydraulic circuit to the direct (3, 5, R) clutch latch valve through the PC4Z hydraulic circuit. With the direct (3, 5, R) clutch latch valve in position to release the direct (3, 5, R) clutch, it opens the PC4Z hydraulic circuit to the PC4R circuit to position the low/reverse (1, R) clutch regulator and latch valves to apply the low/reverse (1, R) clutch.
Low/Reverse (1, R) Clutch Hydraulic Circuit Diagram (Applied in Park, Neutral or Manual 1st)