Transmission Parts Aisin AW TF-81SC TF-80SC Valve Body Valve / Sleeve

Symptoms:

Erratic line pressure
Low line rise in Drive
Low line rise in Reverse
Bushing failure
High line pressure in Reverse

Cause:

Wear at the inner bore results in excess pressure and reduced cooler/converter flow. Boost sleeve wear allows oil loss, resulting in poor line rise.

Correction:

Sonnax main oversized pressure regulator valve and boost valve kit allows the valve body bore to be restored to normal operating condition.

TF-80SC, TF-81SC

Oversized Main Pressure Regulator & Boost Valve Kit
Part No. 39741-01K

Fits Volvo (AM6), Opel (AF40), Peugeot (TF80), Saab (AF40/6), Land Rover (TF80), Ford (AF21) and Mazda (AW6A-EL).

Tooling:

F-39741-TL
VB-FIX

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Aisin AW TF-80/81SC transmissions may exhibit various concerns related to line pressure instability caused by wear in the main pressure regulator bore. This results in excess line pressure, harsh shifting and reduced cooler flow that leads to overheating. Additional problems such as poor line rise, erratic shift quality and burnt clutches can surface when the boost sleeve wears. Installation of Sonnax oversized main pressure regulator and boost valve kit 39741-01K re-establishes critical valve-to-bore clearance and restores normal line pressure operation.

Hardcoat anodized aluminum valves combat premature wear
Sleeve is made from high-quality aluminum to reduce wear

Contents

Pressure Regulator Valve
Pressure Regulator Spring
Boost Sleeve
Boost Valve

Valve Body Layout

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.