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 Blue
Plate High Performance frictions including a 7 friction 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, 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" sunshell, 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/Procare Transmission shift improvement kit (with "corvette" servo) is included with a FREE tub of transmission assembly lube.
In the 4L60 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. The 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.
In the 4L60 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. The 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 4L70E transmission up to 2010 model year GM
used a six friction setup. All Trutech/Procare 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 integrity 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 is one check valves that are very important to 3-4 clutch life. This check valve
is the 3rd accumulator check valve. This valve has a direct effect on 3-4 clutch operation. We include this check valve in all our kits, we consider this
low cost insurance.
In this General Motors transmission bushings play a large part in hydraulic integrity. In a lot of rebuilds, the bushings are not replaced if they "look"
good. 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 apply area.
If you have any transmission technical questions contact us by email. This is a free service provided to our customers. No purchase is required. All
questions will be answered within 24 hours. Thank you for for choosing Trutech/Procare Performance Transmissions.
Questions concerning your order call 334-470-1288.