Product Description
ZF8HP70 ZF8HP75 ZF8HP55 Heavy Duty Performance "A" Clutch Back Plate
Sonnax Part Number: 35570-70
The "A" 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 1st/2nd, 7th/8th and Reverse Gears and ratio codes. Sonnax heavy duty “A” clutch backing plate 35577-70 is designed to prevent flexing when the clutch is applied, eliminating the leading cause of "A" 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
- Prevent comebacks by installing in units that have not yet failed
PACKAGE CONTAINS
- Plate (1)
SYMPTOMS
- No Reverse
- Reverse slip
- "A" Clutch burned
- Gear ratio codes
- Slipping gears
CAUSE
CORRECTION
Eliminate the flexing that leads to comebacks by installing the thicker, stiffer Sonnax "A" clutch backing plate.
