Part Information
ZF8HP55, ZF8HP70, ZF8HP75
Sonnax Heavy Duty “D” Clutch Backing Plate
Part No. 8HP70.PP22
The “D” clutch in ZF8HP55, ZF8HP70 and ZF8HP75 transmissions has a thin, stamped OE backing plate that allows flexing and bowing (coning) of the clutch pack. This wears the clutches unevenly, generating and concentrating extra heat which leads to clutch burnup. The result is slipping or no 4th through 8th and Reverse Gears, as well as ratio codes. Sonnax heavy duty “D” clutch backing plate 35570-75 is designed to prevent flexing when the clutch is applied, eliminating a leading cause of “D” clutch failure.
2X thicker than weak, stamped OE backing plate for significantly improved protection against burnup
Easy to install, no special tools or machining required
Prevents comebacks by installing in units that have not yet failed
Specs
Material: Billet Steel
