We are proud to provide only the best parts to our customers. Our Performance Overhaul Kits are complete with all parts necessary
to overhaul and upgrade the clutches and band in your transmission. We have included parts necessary to restore hydraulic intregrity.
Your transmission frictions will be capable of supporting up to a 750HP horsepower engine. To support high horsepower engines gear train
Our kits contain parts that are very important to long clutch life. These parts are not included in kits sold by other venders:
This is the complete kit with all the parts necessary to upgrade your transmission to support high horsepwer engines
The KIT IS OFFERED AT A GREATLY DISCOUNTED PRICE WHEN COMPARED TO PURCHASING THESE PARTS SEPARATELY..
Build it yourself the right way and save money also!
For applications stock to 550 horsepower:
Complete Raybestos Stage One Friction Kit:
Complete set steels with 3-4 Kolene steels:
Complete gasket and seal kit:
Wide Raybestos Pro Series Band:
ACdelco 3-4 Apply and Backing plates for proper 3-4 clearance:
New ACdelco reverse input drum:
"Beast" sun shell:
ACdelco 5 pinion rear planetary gear:
Trutech Performance Shift Improvement Module:
Complete bushing kit with Teflon front pump bushing:
Complete thrust washer kit:
ACdelco 3rd accumulator and 3-4 exhaust check valves for hydraulic integrity:
3 input drum bonded steel clutch pistons:
Sonnax replacement load release springs:
Quality OEM filter:
This kit is complete with everything you need to build your transmission like a professional high performance builder. Starting with Raybestos Stage One
frictions including a 7 friction setup for the 3-4 clutch and steel kit that includes thick kolene 3-4 steels plus turbulator low/reverse and reverse input
steels. The 3-4 steels have been kolene treated. Kolene treatment is a thermochemical diffusion process, whereby ferrous parts are processed in molten salt
with a specific nitrogen potential. This process provides a surface treatment that enhances wear and fatigue resistance from 200% to 500%. Also included is
a complete gasket/seal kit, complete bushing kit with the teflon coated front pump bushing, the apply and backing plate necessary for proper 3-4 clutch
clearance, 3-4 apply ring, three bonded input drum pistons with updated overrun spring, extra wide high energy carbon 2-4 band, a new ACDelco reverse drum
(for the wide band), the "beast" sun shell, new ACDelco 5 pinion rear planetary, a 29 element forward sprag, performance separator plate, 3-4 exhaust check
valve, 3rd accumulator check valve, Sonnax 3-4 replacement load release springs, thrust washer kit and OEM filter. To enhance shift performance a TruTech
Transmission shift improvement kit (with "corvette" servo) is included with a FREE tub of transmission assembly lube.
In the 4L60/700r4 type transmission the 3-4 clutch is contained in the input drum. The clutch is applied when hydraulic fluid moves the 3-4 piston causing
the 3-4 apply ring to engage the clutch. Over the years all these parts have been updated by General Motors. In an automatic transmission it has been proven
if you increase the number of frictions in a clutch set up you can increase the torque handling capability of
that particular clutch. One issue with this theory, to increase the number of frictions the steels must be thinner to get proper clearance. T
he 3-4 clutch in this transmission does not work well with thin steels because of the inability to dissipate heat causing
the steels to warp. General Motors went from a five friction setup in 1982 to a seven friction set up with six thick steels in the later model 4L65/70E
heavy duty transmissions. However, in the standard 4L60E transmission up to 2010 model year GM used a six friction setup. All Trutech Overhaul Modules
contain the seven friction, six "thick" steel clutch components. To install this clutch correctly we have included all the additional factory and/or quality
aftermarket parts necessary to achieve proper clutch clearance. One additional benefit to this Overhaul Module, we have included turbulator steels for low
reverse and reverse input clutches. Turbulator steels are designed with holes strategically cut into the steel. The holes prevent a temporary fluid
coupling in the reverse clutches that would cause the reverse and forward clutches to be engaged at the same time. All OEM parts included in our Overhaul
Module are high quality and meet or exceed factory specification.
To ensure hydraulic intregrity our Overhaul Module contains three updated steel molded input drum pistons. Because of changes to the overrun
piston the overrun spring must be updated with the ACdelco spring included in the module. There are two check valves that are very important
to 3-4 clutch life. These check valves are the 3-4 exhaust check valve in the input drum and the 3rd accumulator check valve. Both these
valves have a direct effect on 3-4 clutch operation. We include these check valves in all our kits, we consider this low cost
In this General Motors transmission bushings play a large part in hydraulic intregrity. In a lot of rebuilds, the bushings are not replaced
if they "look" good. The fact is, a small amount of wear in the bushing can cause a hydraulic leak which leads to early clutch failure. Our
recommendation is replace all bushings in your Overhaul.
In the 4L60 type transmission the band is applied to move the vehicle forward in the 2nd and 4th gear range. There have been many improvements
to this one component. In this High Performance Build Module we use the extra wide carbon band with heavy duty anchors. When using this extra
wide band we strongly recommend replacing the reverse input drum to give the band a new wear surface. Replacing the drum is always a good
idea but not always necessary when using the stock width band. Do not reuse the drum if it is discolored from heat or is warped in the band
WE HAVE INCLUDED A NEW ACdelco REVERSE DRUM IN THIS KIT.