Trutech Street Performer Rebuild Kit Alto Red Eagle & Raybestos Gpz 97-03 4l60e on 2040-parts.com

 Trutech Performance Transmission

Custom Street Performer Overhaul Kit

1997-2003 4L60E

Street / Strip up to 450 HP

Extreme Duty Raybestos GPZ105 3-4 Clutch

  At Trutech Performance Transmission we are proud to provide only the best parts to our customers.  Our Street Performer Overhaul Modules are very complete with all parts necessary to overhaul your transmission with upgraded clutches and band.  We have included parts necessary to restore hydraulic integrity to your transmission to help ensure long clutch life. This is a custom overhaul module not available from any other supplier.  Your transmission will be capable of supporting up to a 450 horsepower (non nitrous) engine.

   This kit is complete with Alto Red Eagle Forward and overrun frictions including a 7 friction Raybestos GPZ high energy setup for the 3-4 clutch. The steel kit includes thick kolene 3-4 steels plus turbulatolow/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 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, high energy 2-4 band, 3rd accumulator check valve, new 3-4 load release replacement springs and OEM filter.

   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 4L60E transmission up to 2010 model year GM used a six friction setup. All Trutech Overhaul Modules contain the 4L65/70E seven friction, six "thick" steel clutch components. To install this clutch correctly we have included all the additional factory 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 valve that is 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.  We have found the Raybestos high energy band is an excellent choice in street driven high performance or heavy duty applications. This band is included in our overhaul module.  In our High Performance Build Modules 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.

   Combine this kit with one of our shift improvement modules and our gear train module to give you a strong durable transmission.

    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 choosing Trutech Performance Transmissions.

We have a new number to contact us concerning your order or for technical assistance, 1-800-762-9846. You can call this number between the hours 10:00 a.m. - 4:00 p.m. CST Monday-Saturday.Toll free number is for U.S. calls only. For calls from outside U.S. call 1-334-577-4400.