January 29, 2020
Bushwhacked! Keys to Avoiding Preventable Bushing Problems
Brian Wing
Symptoms:
- Bushing wear
- Bushing failure
- Clutch failure
- Harsh shifts
- Gear ratio & solenoid codes
Cause:
Premature wear due to sub-optimal OE bushing material in ZF 8-speed units allows fluid loss and misalignment that results in harsh shifting and clutch failure.Correction:
Install improved Sonnax bushing kit to restore critical clearances and resist untimely wear.Warning:
Caution: Use of an arbor press is required for correct installation. Do not use a hydraulic press or a bushing driver/hammer combination to install, as doing so may distort the bushing and cause fitment issues.
845RE, ZF8HP45, ZF8HP50, ZF8HP55, ZF8HP70, ZF8HP75
Bushing Kit
Part No. 35030-01K
View Instructions
Find a Distributor
OE bushings in Chrysler 845RE and listed ZF 8-speed units have a tendency to wear out prematurely due to sub-optimal material composition. This wear can lead to bushing failure, harsh shifts, burnt clutches and gear ratio or solenoid codes. Sonnax improved bushing kit 35030-01K restores worry-free operation.
- Upgraded material composition outperforms OE bushings
- Superior wear characteristics eliminate premature deterioration
- "A" Hub Front Bushing
- "A" Hub Rear Bushing
- P1 Planet Bushing Fits 1.812" housing bore dia.
- P1 Planet Bushing Fits 1.811" housing bore dia.
- P4 Front Sun Gear Bushing
- P4 Rear Sun Gear & Planet Carrier Bushings (2) Fits rear of P4 sun gear and P4 planet carrier locations
- Front Stator Support Bushing
- Material: Steel-backed alloy
- Bushing Style: Precision
Related Sonnax Parts
Required
Recommended
Required
Recommended
Required
Recommended
Required
Recommended
Required
Recommended
ZF8HP55, ZF8HP70, ZF8HP75
Heavy Duty "A" Clutch Backing Plate 35577-70
- Material: Billet Steel
-
Helps cure:
- No Reverse
- Reverse slip
- "A" Clutch burned
- Gear ratio codes
- Slipping gears
Required
Recommended
850RE, ZF8HP51, ZF8HP55
Heavy Duty "E" Clutch Hub 35572-62T
62 Splines
-
Helps cure:
- Code P0731
- No 2nd
- No 3rd
- No 4th
- No 6th
- No 8th
- Failsafe mode
- Gear ratio codes
Required
Recommended
845RE, ZF8HP45
Heavy Duty "E" Clutch Hub 35572-53T
53 Splines
-
Helps cure:
- Failsafe mode
- Gear ratio codes
- Code P0731
- No 2nd
- No 3rd
- No 4th
- No 6th
- No 8th
Required
Recommended
ZF8HP55, ZF8HP75
Heavy Duty "E" Clutch Hub 35572-48T
48 Splines
-
Helps cure:
- Failsafe mode
- Gear ratio codes
- Code P0731
- No 2nd
- No 3rd
- No 4th
- No 6th
- No 8th
Required
Recommended
ZF8HP70, ZF8HP75
P1 Planet Bushing 35030-03A
Fits two-wheel drive units only.
- Material: Steel-backed alloy
- Bushing Style: Precision
- Housing Bore: 1.811"
- Shaft Dia.: 1.692"
- Width: 0.394"
-
Helps cure:
- Bushing wear
- Bushing failure
- Clutch failure
- Harsh shifts
- Gear ratio & solenoid codes
Required
Recommended
845RE, ZF8HP45, ZF8HP50, ZF8HP55, ZF8HP70, ZF8HP75
P1 Planet Bushing 35030-03
In ZF8HP70/75 units, fits four-wheel drive only.
- Material: Steel-backed alloy
- Bushing Style: Precision
- Housing Bore: 1.812"
- Shaft Dia.: 1.692"
- Width: 0.394"
-
Helps cure:
- Bushing wear
- Bushing failure
- Clutch failure
- Harsh shifts
- Gear ratio & solenoid codes
Required
Recommended
Required
Recommended
845RE, ZF8HP45, ZF8HP50, ZF8HP55, ZF8HP70, ZF8HP75
P4 Sun Gear & Planet Carrier Bushing 35030-05
Fits rear of P4 sun gear and P4 planet carrier locations.
- Material: Steel-backed alloy
- Bushing Style: Precision
- Housing Bore: 0.993"
- Shaft Dia.: 0.873"
- Width: 0.394"
-
Helps cure:
- Bushing wear
- Bushing failure
- Clutch failure
- Harsh shifts
- Gear ratio & solenoid codes