Zip Kit for GM 6L45/6L50/6L80/6L90 Transmission Valve Body

The Sonnax Zip Kit 6L45-6L90-ZIP is engineered to tackle the root causes of common complaints in GM 6L45, 6L50, 6L80, and 6L90 valve bodies by effectively sealing critical circuit pressure losses. This comprehensive kit prevents the loss of pressure within the main line, clutch apply control, solenoid feed, and lockup control circuits, ensuring optimal transmission performance. It also addresses leaks from end plugs and issues with checkball sealing. This kit contains a variety of specialized parts designed for direct installation, including a Pressure Regulator Valve Kit, Boost Valve Kit, Clutch Select Valve Spring Kit, Compensator Feed Regulator Valve Kit, TCC Regulator Valve components, O-Ringed End Plugs, Actuator Feed Limit Valve assembly, Center Support Seal Kit, Vacuum Test Nut, and eight 0.250" checkballs. Installation is straightforward, requiring no special tools, and typically no reaming is necessary. Accompanying the kit is a detailed technical booklet that provides clear, easy-to-follow instructions on a single sheet. This guide offers general rebuilding tips, technical information, and specific vacuum testing procedures at key valve body locations, facilitating a thorough and efficient repair process to get the vehicle back on the road quickly.