Transmission Parts Toyota/Lexus UA80E UB80E UA80F UB80F Valve Body Valve / Sleeve

Symptoms:

Delayed engagement
C1 Clutch burned
Poor shift quality

Cause:

Wear on the I.D. of the sleeve prevents proper positioning of the inboard C1 relay valve.

Correction:

Sonnax drop-in C1 apply boost valve kit has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.

UA80E, UA80F, UB80E, UB80F

C1 Apply Boost Valve Kit
Part No. 168740-01K

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Vehicles with listed Toyota transmissions may exhibit insufficient line rise in drive ranges, soft shifts and/or burnt C1 clutches. These problems may be caused by continuous oscillation of the C1 apply boost valve within the boost sleeve, creating excessive wear and a path for line pressure fluid to leak to exhaust. Sonnax C1 apply boost valve kit 168740-01K has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.

Sleeve is manufactured from highly wear-resistant billet aluminum to prevent wear
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.