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Animal Performance 700r4-4l60e Input drum upgrade

Posted by Anthony Vargas on

New input drum upgrade available on all 700r4/4L60 builds custom built for Animal Performance with our logo on it. 


The largest 3-4 clutch pack anywhere. 

Starting with a bottom pressure plate that's been laser cut from a rigid material and then machined for fitment and to maximize clutch stack up height.

From there we machine the input housing to allow the use of custom larger outside diameter steels. Machining of the drum also consist of milling the top flat to again achieve more clutch stack up height, then threading the outside of the drum.

A top pressure plate / drum cap is machined from 6061 aluminum billets, machined  threaded and profiled to match the drum. The aluminum helps shed the dreaded heat  from the 3-4 clutch better than the other steel versions.

Using our custom steels and supplied Hi-Energy frictions we’ve increased the outside diameter of the friction as well as shrunken the inside diameter creating a 3-4 clutch pack that now has  211%  more friction surface area over a stock 4l60e – all while not having paper thin steels.  Not only does it have that much more friction surface area, but that much more steel surface area as well, further aiding in heat dissipation. The wider based frictions and steels along with the wider, rigid bottom plate and billet top cap prevent all the bowing and coning we have all seen for so many years.

The billet end cap is threaded to the drum tying both drum and cap together making the pressure plate surface and drum rigid, eliminating the bowing and coning. If you choose to reinstall load release springs, provided are 5 new re calibrated load release springs and pins special to this clutch setup.

The threaded cap is locked into place to prevent spin off using 5 set screws. By making the end cap aluminum, it transfers the heat from the top of the clutch pack into the billet cap and then into the input housing itself shedding the heat.


You can add this new Input drum assembly to your build.

Contact us to upgrade!

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  • What do you have for input shaft for your 4l79
    input drum thanks Wayne

    Wayne on
  • Does this drum require the sonnax input drum reinforcement sleeve? I had the sonnax smart-tech input housing with the reinforcement sleeve in my truck. And the housing hub still twisted out towing my car trailer over the Sierras. When it downshifted on its own before I did it myself. Im looking for a strong 4l65e 4×4 transmission build

    dave davis on

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