Lastly, the drop-in USA-made hardened steel B2 Control vale utilizes an unworn area of the bore restoring the circuit integrity. The furnished bushing and valve will restore the solenoid modulator valve function using the existing worn bore. Similarly, a new redesigned drop-in solenoid modulator valve system does not require any tooling. Smooth, short shifts Converter charge pressure that matches engine torque to reduce TCC slip codes Better cooling/lubrication and converter feed/capacity using included optional internal upgrades Corrects/Prevents/Reduces: Codes: 628, P1740, P1744 Soft shifts, 2nd and 3rd burn up Converter burn up Reverse delay, no reverse hot Converter. The kit includes a drop-in USA-made hardened steel TCC boost valve and bushing to restores the hydraulic circuit integrity. As a result, shift quality complaints and codes can occur along with low or high main line pressure. If the pressure feeding the solenoids is too high or too low, output will also be too high or too low. 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. The modulating valve and spring are calibrated to prevent solenoid feed pressure from exceeding a predetermined PSI, no matter what main line pressure is. 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 other area of concern is a worn-out solenoid modulator valve bore. When the TCC boost valve and bushing wear out, the computer can no longer control the apply and release of the lock-up as it is supposed to. The first area of concern leading to the TCC complaints is a worn-out TCC boost valve and bushing. This TransGo Reprogramming Kit provides full manual control for upshifting and downshifting 1 st through 4 th gear, there are no automatic shift functions retained. Common complaints with these transmissions are shuttle or flare on the 2-3 shift, slips with throttle in 3rd and/or 4 th gear and TCC performance codes. L for Models Fits: 1993-2012 Corrects/Reduces/Prevents Updated Cylinder Deactivation Check Light Blinking-P1870/PO894 Code-Brutal 1-2 shift Converter Slip/Shudder-Burnup-Erratic Pump Slide bounce that Wears out pump and valve bores. This U660E SHIFT KIT® Valve Body Repair Kit fits 2006 to 2018 Toyota and Lexus vehicles equipped with the U660E and U660F automatic transmissions.
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