4R70W 4R75 Transmission Reverse Drum With Low-position One-way Clutch For Ford

The **reverse drum with low one-way clutch** in an automatic transmission:

1. **Enables Smooth Reverse Engagement** – Prevents harsh gear lockup during shift to reverse.

2. **One-Way Locking** – Freewheels in forward motion but locks in reverse (prevents mechanical conflict).

3. **Supports Planetary Gearset** – Works with sun/ring gears to reverse output direction.

4. **Reduces Shock** – Absorbs driveline torque reversals.

Failure causes reverse slip or forward/reverse clash!