Low/Reverse Clutch (D) and Low/One-Way Clutch (OWC)
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
The low/reverse clutch (D) holds the rear planetary carrier stationary to the transmission case. The low/reverse clutch (D) is applied in park, reverse, neutral and 1st gear below 5 kph (3 mph).
Regulated hydraulic pressure from the regulator valve in the valve body pushes the low/reverse clutch (D) piston against the low/reverse clutch (D) pack to apply the clutch.
The low/OWC is a brake clutch that holds the rear planetary carrier in one direction and allows it to freewheel in the opposite direction eliminating engine braking in 1st gear when the transmission is in drive, above 5 kph (3 mph) only.
Low/Reverse Clutch (D) and Low/One-Way Clutch (OWC) Exploded View
| Item | Description |
|---|---|
| 1 | Center support assembly |
| 2 | Low/reverse clutch piston |
| 3 | Low/reverse clutch piston return spring |
| 4 | Low/reverse clutch piston retainer |
| 5 | Low/OWC |
| 6 | Low/reverse clutch wave spring |
| 7 | Low/reverse clutch friction and steel plates |
| 8 | Low/reverse clutch pressure plate |
| 9 | Rear planetary carrier assembly |
| 10 | Transmission case |