GM 4T65-E Transmission Superior Shift Correction Kit This Shift Correction Kit from Superior will improve all 4T65-E Transmissions from 1997-05. This Shift Correction Kit eliminates the following problems: Inadequate line pressure, premature clutch failure, slow or intermittent line rise, addresses codes PO741, P1811, PO756, P1618 and other various codes, excessive TCC slippage (codes), side band forward engagement, a new steel boost valve and sleeve is supplied and this kit improves overall performance for regular, heavy duty & taxi applications. This Shift Correction Kit will come with installation directions in English and Spanish and illustrations. We offer a wide range of Superior Shift kits, rebuild kits and everything else you may need for your rebuild! Please see my other listings!