4L80E Competition Components

This one of a kind billet planetary carrier completely eliminates spline stripping and carrier failure at the input shaft interface. Utilizes 91-96 large overdrive roller clutch. This kit includes "planetary carrier without gears". NOTE: This carrier can also be used to retro fit 1997 and up 4L80E transmissions if you have an early OEM overrun clutch housing.bIf not, order part # 4L80ECC/BOC-C which includes the complete overdrive assembly.

Extreme Duty 4L85E 5 pinion planetary geartrain assembly.  The strongest 2.48:1/1.48:1 gearset currently available for the 4L80E transmission. Excellent choice for Humvee and high powered street strip vehicles.

Do not trust your performance 4L80E builds to the low quality manufacturing standards of offshore aftermarket components. This is the OEM Borg Warner Heavy Duty 34 Element Sprag Assembly with the quality, performance and durability the transmission industry has come to expect. Made in the U.S.A.

This kit includes all of the bushings required to overhaul 1991-1996 model GM 4L80E transmission. Select bushing are upgraded to increase transmission performance and durability.

This kit includes all of the bushings required to overhaul 1997-2003 model GM 4L80E transmission. Select bushing are upgraded to increase transmission performance and durability.

This kit includes all of the bushings required to overhaul 2004 and up model GM 4L80E transmission. Select bushing are upgraded to increase transmission performance and durability.

This kit puts an end to output shaft to case thrust and selective washer failure common to the 4L80E in all heavy-duty and hi-performance applications.The kit replaces these items with a high capacity thrust bearing assembly and selective shims to manage thrust loading and allow proper rear end play adjustment. Includes new case bushing.

This kit allows the accumulator housing to be deleted correcting the hydraulics and furnishing a super positive 2-3 and 3-4 upshifts and increased torque capacity. Includes block off plate and mounting hardware. This also provides an excellent fix for a worn or damaged  accumulator housing.

This item is fully CNC machined and shaped in the U.S.A. from E4340 steel billet blanks. The plate will not bend, bow, or deflect under the elevated line pressures encountered in racing applications. Vastly increases intermediate clutch capacity, performance and durability. Fits 1999 and up models with .275" thick flat plate.