500 Horsepower Street/Strip

A quality rebuilt unit with several upgrades including weld reinforced forward drum, 5 clutch direct drum, carbon/Kevlar lined front and rear bands, oiling system modifications, heavy duty forward planet gear,  performance shift improvers and red lined clutches.  Choose from stages 2-4

500 Horsepower Street/Strip with Needle bearings

Contains all of the upgrades included in the standard 500 HP model with the addition of all critical friction type thrust washers are replaced with needle bearing assemblies.

 (2.92:1 1st gear/1.68 2nd gear)

Contains all of the upgrades included in our 500 HP with needle bearings,  except first and second gear ratios have been dropped for improved acceleration.

*Ask us how our Wide Ratio transmissions can improve gas mileage*

This is our premium upgrade for the C4.  It includes weld reinforced forward drum, direct acting forward drum piston (allows use of higher line pressures without disc spring failure), high strength full rollerized forward planetary gear, Vasco input shaft, 6 clutch forward drum, 6 clutch direct drum, large capacity intermediate servo, front and rear rigid Carbon/Kevlar bands, deep cast aluminum pan, all critical friction type thrust washers are replaced with needle bearing assemblies, improved oiling system, full manual or automatic valve body and Cryo treated internals for added strength. Add $250 for optional Pro Tree Transbrake valve body.

Item

Description

Forward Clutch Drum (High Strength)

This is a reverse planet gear fitted with a needle bearing assembly on each side of the planet gear. Eliminates the need to machine output shaft hub which can weaken the hub. Kit includes planet gear and 2 needle bearing assemblies.

This is a reverse drum assembly fitted with a needle bearing between reverse drum and output shaft hub. Bearing is included as well as proper oil modifications to ensure long bearing life.

This kit is easy to install and does not require machining of your case. Designed in our own shop as a “problem solver” for eliminating the #9 thrust washer in favor of a roller bearing. Kit includes sprag inner race, needle bearing assembly, hardened washer and special hub adapter. Don't forget this important location when rollerizing your transmission.

(this valve body will also work in 1982-1986 C5 transmission)

This is a complete kit including all needed soft parts for a thorough high performance rebuild. Kit includes Front Welded Carbon Band, Rear Carbon Band, 5 clutch Direct upgrade kit with red frictions, red forward frictions and steels, complete thrust washer set, wide front pump bushing, extension housing bushing, sprag spring and roller kit, complete gasket and seal kit, teflon seals(70up only)  and steel seals, rebuilt front planet with lube mods and hub with needle bearing, Transgo Reprogramming Kit (40-2 or 47-2) or our reverse pattern shift kit (70up only) and  special instructions. You are also entitled to live tech help with purchase! Please specify year of your trans and which shift kit you prefer.

This is an OEM intermediate servo assembly. Features a large apply area for racing and heavy duty applications. Limited Supplies

This is a new servo assembly with a slightly larger apply area than the H code. (Sonnax Brand)

Same as used in our Racing/Big Block Transmission.

This is a do it yourself kit to convert your stock 1972-1981 valve body to a true full manual reverse pattern shift. No Machining Required! This kit installs with basic hand tools and a hand operated electric drill. Included instructions show you how to fine tune your shifts for a wide variety of applications. (low/rev band does not apply in 1st gear)