Sonnax Sure Cure kit SC-4T60E-1 is a comprehensive reconditioning package for GM 4T60-E PWM units featuring the best Sonnax products developed to help rebuilders restore and enhance transmission performance. Sure Cure components are the same Sonnax parts sold individually to resolve common valve body complaints as well as other transmission problems. The high-quality Sonnax parts in each Sure Cure kit repair worn areas and protect the transmission against future damage. Each kit comes with easy-to-read, step-by-step installation guide that covers the inspection and repair of the most critical areas of the valve body. Restore shift quality Repairs biggest trouble areas to reduce comebacks Includes step-by-step instructions for comprehensive valve/pump body restoration Get everything you need for restoring troublesome units in one place Note This kit is fully compatible with '97 & Later PWM units, which are identified by an aluminum TCC apply valve that will NOT fit in a 15mm wrench. For '93-'96 units, use SC-4T60E, this TCC valve is steel and WILL fit inside 15mm wrench. Contents Reverse Boost Valve Kit Pump Slide Pivot Pin Differential Side Gear Thrust Washers (2) Retainer Clip Boost Valve TCC Regulator & Isolator Valve Kit Modulated Line Boost Valve Kit Oversized TCC Apply Valve Kit Shims, (2) Input Clutch Hub Shim, Differential Carrier-to-Case Checkball .375" Dia. Checkballs (9) .250" Dia