SK A650

This Toyota A650E SHIFT KIT® Valve Body Repair Kit fits 1998 to 2005 Lexus vehicles equipped with the A650E automatic transmission. Common complaints with this transmission are shuttle shifts, bind-up or flare on the 2-3 shift, slips with throttle in 3rd and/or 4^th gear, solenoid and TCC performance codes as well as rough kickdown at highway speeds due to slow TCC release.

The first area of concern leading to the TCC complaints is a worn-out TCC relay boost valve and bushing. When the TCC relay boost valve bore wears out, the computer can no longer control the apply and release of the lock-up clutch as it is supposed to.

The other area of concern is a worn-out solenoid modulator valve bore. The purpose of solenoid modulator valve is to limit the pressure going to solenoids, just like an AFL valve or solenoid pressure regulator valve does on other units. The modulating valve and spring are calibrated to prevent solenoid feed pressure from exceeding a predetermined PSI, no matter what main line pressure is. This is necessary to prevent more fluid from being fed to the solenoids than they can effectively regulate and to limit what max line pressure output is. If the pressure feeding the solenoids is too high or too low, output will also be too high or too low. Consequently, shift quality complaints, solenoid performance and gear ratio codes can occur along with low or high main line pressure.

Features and benefits:

The kit includes a drop-in USA-made hardened steel TCC relay boost valve and bushing to restores the hydraulic circuit integrity. Similarly, a new redesigned drop-in solenoid modulator valve system does not require any tooling. The furnished bushing and valve will restore the solenoid modulator valve function using existing worn bore.

Corrects/Prevents/Reduces:

• Shuttle shifts, bind-up or flare on 2-3 shift
• Slips with throttle in 3^rd and/or 4^th gear
• Rough kickdown at highway speeds due to slow TCC release
• Codes P0746, P0751, P0756, P0771, P0776, P0894, P2714 and P2757

Includes:

• USA-made hardened steel TCC relay boost valve, bushing and retainer
• USA made hardened steel solenoid modulator valve, bushing, spring and end plug
• 0.055” Drill bit