Modified Lube Flow Control Valve Kit
Part No. 168740-16K

Wear in the cooler/lube flow control bore and wear on the valve is a common issue occurring in Toyota/Lexus UA80E, UA80F, UB80E and UB80F FWD and AWD transmissions. This wear minimizes SLT (throttle pressure) control and control of the converter/lube flow circuits resulting in fluid overheating and lubrication failures.

Installing Sonnax modified lube flow control valve kit 168740-16K eliminates the exhaust of crucial pressure escaping the cooler/lube circuit by creating a newly conditioned bore area for the upgraded valve to operate in. The undercut on the major diameter inboard spool of the drop-in Sonnax valve was added to allow for a percentage of the cooler flow to exhaust back to the sump, regardless of the valves positioning in the sleeve. This design helps keep the system from overheating while ensuring that ample fluid flow is traveling to the rear case/differential. Annular grooves have been added on the critical diameters of the valve to help keep the valve centered in the sleeve. These Sonnax features ensure your units will have proper cooler/lube pressure control throughout all drive ranges.

• Sleeve manufactured from highly wear-resistant aluminum
• Hardcoat anodized aluminum valve combats premature wear
• Undercut on the inboard spool allows for constant flow to sump, preventing the system from overheating
• Annular grooves help center the valve in the bore to reduce future side-load wear
• Drop-in Zip Valve™ parts install quickly and easily