Special transmissionfluid for the ZF 8-speed automatic transmission used by several manufacturers.

Oversized TC Switch Valve Part No. 35740-05 ZF

valve name: SV-WD Chrysler valve name: SV-TC Vehicles equipped with ZF8HP45, ZF8HP55 and ZF8HP70 transmissions may display concerns such as no lockup, excess TCC slip, soft or harsh apply and TCC codes.

In some cases, engine stall can occur due to TCC being stuck in the apply position.

These problems can be caused by bore wear at the TC switch valve, which allows crucial pressure loss from the circuit. Reconditioning the bore and installing Sonnax oversized TC switch valve 35740-05 brings the TCC switch circuit back under control by eliminating the path for fluid escape.

• Annular grooves help center valve in bore to reduce side-load wear

• Hardcoat anodized aluminum valve combats premature wear Need to use tool F-35740-TL5

Special transmissionfluid for the ZF 8-speed automatic transmission used by several manufacturers.

ZF8HP45, ZF8HP55, ZF8HP70 Oversized Priming Valve Kit

Part No. 35740-21K

• Valve Spring

• End plug

• O-Rings (3) 1 Extra ZF valve name: DR-RED-V (DR-V) Chrysler valve name: PR-V The variable force solenoids control clutch apply/release, torque converter clutch apply/release and line pressure.

The priming valve insures proper flow and pressure to the solenoids, and is especially crucial during hot conditions and low pressure.

Low solenoid feed pressure at idle can create delayed engagement or wrong gear starts. This priming valve also limits the maximum pressure to all the solenoids.

Excessive solenoid feed pressure can flood the solenoids causing gear ratio codes, harsh up/down shifts and excessive line pressure.

Reconditioning the bore and installing Sonnax oversized priming valve kit 35740-21K eliminates bore wear and stops leakage for proper solenoid pressure control.

Hardcoat anodized valve combats premature wear Annular grooves help center the valve in the bore to resist wear Need to use tool F-35740-TL20

Special transmissionfluid for the ZF 8-speed automatic transmission used by several manufacturers.