Valve Body Zip Kit

The Sonnax U660E-ZIP is a valve body kit engineered to address common complaints in Toyota/Lexus U660E and U660F automatic transmissions by sealing critical circuit pressure losses. This kit targets the root causes of issues such as burnt clutches, delayed engagement, inadequate lubrication, low pressure, slips, flares, soft shifts, and torque converter clutch (TCC) apply and release concerns, as well as TCC codes. This comprehensive kit includes uniquely designed parts to prevent the loss of pressure within the main line, clutch apply control, and lockup control circuits. It also seals multiple circuits known to suffer from end plug leakage or poor checkball sealing. The package contains a B1 Apply Boost Valve Kit, Reverse Boost Valve Kit, O-Ringed End Plug Kit, Solenoid Modulator Drill Bit, Solenoid Modulator Orifice Plugs, Rivets, a Lockup Control Boost Valve Kit, C1 Accumulator Piston Kit, B1, B2, B3 & C2 Accumulator Piston Kit, Viton® Checkballs, a Case Connector O-Ring, a Fluid Temperature Sensor O-Ring, and a Solenoid Modulator Valve, Sleeve, Selective Shims, Spring & End Plug. Installation is straightforward, with drop-in Zip Valve™ parts that install quickly and easily, requiring no reaming or special tools. The kit comes with a detailed technical booklet that includes clear, easy-to-follow instructions on one sheet, general rebuilding tips, technical information, vacuum testing details, and locations of other key areas within the valve body for comprehensive repair.