Transmission Parts Toyota/Lexus U341F U341E Valve Body Valve / Sleeve

Symptoms:

Converter shudder & TCC slip
Engine stall at idle
Harsh downshifts
No lockup
Overheated fluid
Poor fuel economy
RPM surge on coast
TCC apply & release concerns
TCC codes

Cause:

Bore wear at the lockup control valve allows pressure loss that causes drivability concerns.

Correction:

Eliminate bore wear and restore normal operation by reconditioning the bore and installing Sonnax oversized lockup control valve kit.

U341E, U341F

Oversized Lockup Control Valve Kit
Part No. 37740-08K

Tooling:

F-37740-TL8
VB-FIX

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Toyota/Lexus vehicles equipped with U341E and U341F units may have TCC apply and release concerns such as no lockup, slipping lockup or TCC stuck on. Improper lockup can result in harsh downshifts or engine stall at idle as well as associated trouble codes. On vehicles equipped with a lockup control valve train, bore wear allows control pressure to escape the circuit. Reconditioning the bore and installing Sonnax oversized lockup control valve kit 37740-08K renews TCC operation by restoring critical clearances and preventing pressure loss.

Hardcoat anodized aluminum valves combat premature wear
Annular grooves help center valve in bore to reduce future side-load wear

Note

Not all U341E and U341F units have a lockup clutch control valve train. Verify this valve train is present prior to ordering kit. Units that do not contain this valve train will have an empty bore.

Contents

Lockup Control Valve
Plunger Valve
Plunger Sleeve
Retainer

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.