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

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Symptoms:

Delayed Reverse
Low line rise in Reverse
B2 Clutches burned
C3 Clutch burned

Cause:

Continual boost valve stroking results in sleeve bore wear and loss of Reverse pressure.

Correction:

Installing Sonnax drop-in boost valve kit restores critical tolerances to bring back normal operating conditions.

TF-80SC, TF-81SC

Boost Valve Kit
Part No. 39741-44K

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

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In Aisin AW TF-80SC and TF-81SC transmissions, the boost sleeve wears from repeated oscillation of the boost valve, allowing Reverse pressure to exhaust. This can result in delayed Reverse, low line pressure in Reverse and/or burnt C3 and B2 brake clutches. Sonnax boost valve kit 39741-44K eliminates these concerns and restores proper hydraulic control. The drop-in Zip Valve^™ parts install quickly and easily.

Learn More About Zip Valve™ Drop-In Repairs

Contents

Valve
Sleeve

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.