We re-inspect the input drum before installing new rubber seals and a neoprene lubrication seal. Next, we install new heavy duty overrun friction plates, A BORG WARNER DUAL CAGE INPUT SPRAG ASSEMBLY, and carbon composite forward friction plates. These forward friction plates have a superior holding capability as well as improved ability to withstand extreme heat; when compared with the OEM friction plates. Since these friction plates must hold the power of your vehicle in every forward gear, they have to be tough enough for the job.

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Finally, we replace the 3-4 clutch set with 8 high-energy Borg Warner friction plates and Raybestos steel plates to avoid heat burn and coning.

Transmission 4l60e For Sale

Next, we install the reverse input drum for the new Max Duty Performance Wide Band. This band has approximately 20 percent more surface area for holding in both second and fourth gears. This stronger 2-4 band will hold the torque during that tire chirping shift into second at full throttle in your performance machine.

Avogadro
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We also install the *SONNAX BILLET * for maximum “apply pressure” in second gear and the Sonnax twin piston super servo for overdrive, providing an additional 30 percent holding ability in 4th gear.

Now we move on to the pump. It is inspected and modified to provide maximum lube to the planetary sets. We install a large boost valve suitable for the application. The vanes in the pump are carefully inspected for wear and replaced as needed. Steel pump rings are installed. The pump bushing is replaced with a Teflon bushing, and notches are made in pump surface to prevent its movement in even the most demanding high RPM or towing situations. This effectively eliminates front seal blow out. In addition, the front seal is installed with a special adhesive and seal retainer to eliminate any possibility of ever having a problem. The pump is the heart and soul of any automatic transmission, and we make sure it’s a healthy one. Max line pressure to between 210 and 225 PSI; which is dyno verified, of course.

The last section is the valve body. For this we use all we have learned over the years. Although most shift kits have certain distinct advantages, what we have learned is no one kit has all the best modifications… some parts we liked, others we didn’t. We took the best parts of each, and utilizing our own experience, created a set of modifications that is superior to all the others. We do not block accumulators, since the reason they exist is to prevent excessive shock to the transmission and drive train. With our transmissions, you will always have a solid, firm shift that will be linearly progressive. That means at light throttle you will feel a nice bump, letting you know the car or truck has shifted. As throttle is increased, the shifts will become more pronounced to the point of tire chirping in high performance vehicles or a firm shift at full throttle in a towing/hauling situation. It will not cause whiplash just cruising with your significant other or your grandmother around town, but will turn heads when laying it on the line.

We also eliminate the partial lockup function GM mistakenly engineered into the 4L60E transmission, thus eliminating converter shudder, premature converter clutch failure, and the well known code 1870, which causes high “line pressure”, no fourth gear, and teeth cracking shifts at low throttle. Lockup is either OFF or ON, not slipping off and on as it did with the factory PWM working. This does not affect performance, but it does have the added advantage of increasing low speed fuel efficiency, which at today’s fuel prices is like getting a bonus. In addition, this modification, along with others, allows us to use later valve bodies on older units to improve performance and increase interchangeability and reliability.

So there you have it. Equipment rental tracker plus. Our LEVEL 2 TRANSMISSION, designed to meet your needs today, tomorrow, and for many years to come!