4L80-E, 4L85-E Heavy Duty Input Shaft Part No. 34670-01 Input shaft failure is a common problem in performance and heavy duty GM…
4L80-E Extreme Duty Input Shaft Part No. 34670-02 Input shaft failure is a common problem in performance GM 4L80-E and 4L85-E transmissions…
Heavy Duty Main Shaft Main shaft failure is a common problem in performance and heavy duty GM TH400, 4L80-E and 4L85-E…
4L80E Overdrive Planetary (Early) This overdrive planetary assembly is redesigned with a billet steel drive plate to eliminate spline/housing failure in…
4L80E Overdrive Planetary (Late) This overdrive planetary assembly is redesigned with a billet steel drive plate to eliminate spline/housing failure in…
Sonnax extreme duty forward clutch hub kit 34322-02K is manufactured from forged 4140 steel and features nitrited and case-hardened splines…
4L80-E, TH400 Case Saver Retainer Part No. 34762-10 Sonnax case saver retainer 34762-10 for the GM TH400 and '98-earlier 4L80-E is the…
4L80-E Case Saver Retainer Part No. 34762-20 Fits '99-later 4L80-E. Sonnax case saver retainer 34762-20 for '99-later GM 4L80-E units is the only…
4L80-E, 4L85-E, TH400, TH425 Extreme Duty Forward Clutch Hub Kit Sonnax extreme duty forward clutch hub kit 34322-02K is manufactured from…
This 400, 4L80E Billet Aluminum Direct Drum is manufactured specifically for drag racing Comes complete with: Billet aluminum piston and 3 Sure…