6L80E / 6L90E 4-5-6 Clutch Backing Plate, Sonnax #104140A-01, GM #24240654
Sonnax 4-5-6 Clutch Backing Plate
Part No. 104140A-01
OE Part No: GM 24240654
- Material: Steel
GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to flexing and bowing of the backing plate (coning), especially when clutch apply pressures exceed OE specification. The heavy-duty Sonnax 4-5-6 clutch backing plate 104140A-01 is designed to minimize flexing/bowing when the clutch is applied, drastically reducing the likelihood of clutch plate distortion.
- Stiffer backing plate design outperforms OE and aftermarket plates