U660E, U660F

Symptoms:

• TCC apply & release concerns
• TCC slip codes
• Burnt converter
• Overheated fluid

Cause:
Wear at the lockup control boost valve and sleeve can allow the converter control valve to stroke to the apply position prematurely, resulting in converter apply/release complaints, slip codes, overheated fluid or a burned converter.

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

Vehicles with listed Toyota/Lexus transmissions may exhibit converter apply/release complaints, slip codes, overheated fluid or a burned converter. These problems may be caused by continuous oscillation of the steel lockup control boost valve within the cast aluminum boost sleeve, creating excessive wear and a path for converter/cooler fluid to exhaust and the lockup control valve to stroke prematurely.

This Sonnax lockup control boost valve kit has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.

• Boost sleeve is manufactured from highly wear-resistant billet aluminum to prevent excessive wear
• Restores proper line rise
• Drop-in Zip Valve™ parts install quickly and easily

Contents:

• Valve
• Sleeve

SONNAX Installation Instructions