NEW! Smart-Tech® Input Housing Kits with Heavy Duty Input Shafts

Tackling six weak areas of the GM 4L60, 4L60-E, 4L65-E, and 4L70-E input housing, these three cutting-edge Smart-Tech input housing kits with heavy duty input shafts are the ultimate 3-4 clutch solutions:

1. Increase 3-4 Clutch Capacity
2. Stop Flexing/Bowing of the 3-4 Backing Plate
3. Prevent Input Housing Breakage near the Input Shaft Spline
4. Protect Against Input Housing Fatigue Failure
5. Eliminate 3-4 Snap-ring Blow-out
6. Prevent Input Shaft Failure

GM 4L60-E, 4L65-E, 4L70-E

  • 300mm Shaft Kit for Non-Reluctor Units
    77733-11K
  • 300mm Shaft Kit for Reluctor Units
    77733-12K

GM 4L60, 4L60-E

These kits are 100% leak tested, include a bolt-on anchor plate for increased clutch durability and feature the all-new Sonnax heavy duty input shafts.