8L45 Automatic Transmission 2-3-4-6-8 And 4-5-6-7-8 Reverse Gear Clutch Assembly

The reverse clutch assembly in automatic transmissions is a critical hydraulic-actuated component enabling reverse gear engagement. Key points:

1. Function – Applies pressure to clutch packs, locking the planetary gearset for reverse output rotation.

2. Design – Multi-plate setup (steel/friction discs) with a piston, seals, and return springs.

3. Failure Modes – Burnt friction material, seal leaks, or piston sticking (causing delayed/no reverse, slippage, or abnormal noise).

4. Root Causes – Low fluid pressure, overheating, or contamination from worn clutch material.