Shift Performance Kits

4L80E Transmission Reprogramming Kit w/ Manual Shift Control by TransGo

4L80E Transmission Reprogramming Kit™with Manual Shift ControlFits 1991-2013 4L80E, 4L85E This 4L80E-3 Reprogramming Kit fits 1991 to 2013 General Motors vehicles equipped with the 4L80E and 4L85E automatic transmission with gas engines only...

4L80E Sure Cure® Kit by Sonnax (Tooling Required)

4L80-E, 4L85-E The Sure Cure® KitPart No. SC-4L80E Tooling Required: 77754-TL Sonnax Sure Cure kit SC-4L80E, fully compatible with '91-later GM 4L80-E and 4L85-E units, is a comprehensive reconditioning package featuring the best...

4L80E 4L85E Transmissioni Reprogramming Kit by TransGo (1991-2009) 4L80E-HD2

Fits 4L80E, 4L85E, 91-09 This kit stops direct clutch burnup with Dual feed to the Direct Clutch. Holds BIG Horsepower and prevents broken case and drum due to excessive pressure. Upgraded 10/07 to include a triple layer separator plate, for Easy...

4L60E 4L80E Transmission Overdrive-Lockout Switch by Superior (1991-1999)

4L60E/4L80E Transmission Overdrive-Lockout Switch Made in the USA by Superior Transmission Parts 4L60E Model Years 1993-1998 4L80E Model Years 1991-1998 The Superior Overdrive-Lockout Kit for GM 4L60E and 4L80E transmissions is designed for vehicle...

4L60E 4L80E Transmission Driver Adjustable Pressure Riser Package

4L60E/4L65E/4L70E/4L80E Driver Adjustable Pressure Riser Kit Made in the USA by Superior Transmission Parts The Driver Adjustable PressureRiser is ideal for any vehicle that is used partially for towing.  It allows the driver to give the...

4L80E Transmission Shift Kit (1991-UP) Transgo

GM 4L80E Transmission Valve Body Shift Kit by Transgo This is a high quality valve body shift kit, manufactured by Transgo, for use in GM 4L80E/4L85E automatic transmissions from 1991 and up.  It includes a new boost valve assembly, high pressure...

GM 4L80E Transmission PowerTow Performance Shift Kit (1990-UP) Fairbanks

GM 4L80E Transmission HD Performance Shift Kit Don't Blow It - PowerTow It! Made in the USA by Superior Transmission Parts Each Fairbanks 4L80E PowerTow Shift Kit includes Superior's dual feed direct setup and easy to follow instructions making this kit...

GM 4L80E Valve Body Shift Correction Kit by Superior (1997-2007)

GM 4L80E Transmission Valve Body Shift Kit 1991-2007 The Superior Transmission Parts 4L80E transmission valve body shift correction kit offers the option of regular and heavy duty applications in the same package.  It also offers a complete new...