Sonnax Chrysler 850RE Transmission

Internal

"A" Hub Front Bushing 35030-01

Material: Steel-backed alloy
Bushing Style: Precision
Housing Bore: 1.419"
Shaft Dia.: 1.299"
Width: 0.315"

Helps cure:

Bushing wear
Bushing failure
Clutch failure
Harsh shifts
Gear ratio & solenoid codes

"A" Hub Rear Bushing 35030-02

Material: Steel-backed alloy
Bushing Style: Precision
Housing Bore: 1.427"
Shaft Dia.: 1.306"
Width: 0.472"

Helps cure:

Bushing wear
Bushing failure
Clutch failure
Harsh shifts
Gear ratio & solenoid codes

Bushing Kit 35030-01K

Material: Steel-backed alloy
Bushing Style: Precision

Helps cure:

Bushing wear
Bushing failure
Clutch failure
Harsh shifts
Gear ratio & solenoid codes

Front Stator Support Bushing 35036

Bushing Style: Precision
Material: Steel-Backed Alloy
Housing Bore: 1.205"
Shaft Dia.: 1.085"
Width: 0.591"

Helps cure:

Bushing wear
Bushing failure
Harsh downshifts
TCC apply & release concerns
Harsh TCC apply

Heavy Duty "A" Clutch Backing Plate 35577-45

Material: Billet Steel

Helps cure:

No Reverse
Reverse slip
"A" Clutch burned
Gear ratio codes
Slipping gears

Heavy Duty "D" Clutch Backing Plate 35570-50

Material: Billet Steel

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

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

P4 Front Sun Gear Bushing 35030-04

Material: Steel-backed alloy
Bushing Style: Precision
Housing Bore: 1.158"
Shaft Dia.: 1.038"
Width: 0.394"

Helps cure:

Bushing wear
Bushing failure
Clutch failure
Harsh shifts
Gear ratio & solenoid codes

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

Valve Body

Accumulator Piston Kit 95740-15K

Also fits Ford CFT23.

Helps cure:

Downshift clunk
Firm shifts
Erratic EDS solenoid control and/or EDS codes

O-Ringed End Plug Kit 35740-45K

Helps cure:

Soft shifts
Flare shifts
Harsh shifts
Burnt clutches
Pressure loss

O-Ringed Latch Valve End Plug Kit 35740-44K

Helps cure:

Low solenoid feed pressure
Erratic shift feel & engagements
Inconsistent shift quality
Premature clutch failure

Oversized Pressure Regulator Valve Kit 35740-40K

Helps cure:

Poor line pressure control
Low line rise in Drive
Soft shifts
Burnt clutches
Premature clutch failure
Low pressure

Tooling:

F-35740-TL
VB-FIX

Priming Valve & Seal Kit 35740-37K

ZF valve name: DR-RED-V (DR-V) Chrysler valve name: PR-V

Helps cure:

Harsh shifts
Neutral shifts
Gear loss
Delayed engagement
Wrong gear starts
Flare shifts
Gear ratio & solenoid codes

Reducing Valve Kit 35740-38K

Helps cure:

Poor line pressure control
Low line rise in Drive
Soft shifts
Burnt clutches

Tech Resources

August 05, 2024

ZF 8-Speeds: How to Properly Fill with ATF

Jim Mobley

July 14, 2021

How to Prevent ZF8, 845RE, 850RE "A" Clutch Failure

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