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This U140 SHIFT KIT® Valve Body Repair Kit fits 1998 and newer Toyota and Lexus vehicles equipped with the U140, U240 and U241 series automatic transmissions. Common complaints with these transmissions are shuttle shifts, neutrals on the 2-3 shift, TCC slip codes as well as solenoid performance codes.
The first area of concern leading to these complaints is a worn-out TCC boost valve and bushing. When the TCC boost valve and bushing wear out, the computer can no longer control the apply rate 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. As a result, shift quality complaints and 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 boost valve and bushing restores the hydraulic circuit integrity. Similarly, a new redesigned drop-in solenoid modulator valve system does not require any tooling. The furnished valve, spring and bushing will restore the solenoid modulator valve function using the existing worn bore.
- Shuttle shifts
- Neutrals on the 2-3 shift
- TCC slip codes
- Solenoid performance codes
- USA-made hardened steel TCC boost valve and bushing
- USA made hardened steel solenoid modulator valve, spring and bushing
- 0.055” Drill bit