New input drum upgrade available on all 700r4/4L60 builds the 4L79 Drum custom built for Animal Performance with our logo on it.
The largest 3-4 clutch pack anywhere.
RIGIDITY RIGIDITY RIGIDITY – its only part of what you get, the icing on the cake is the massive amount of new clutch surface area.
Starting with a bottom pressure plate thats 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.
The Oem inner clutch hub / ring gear is then machined to match the internal tooth profile of th350 forward / direct friction clutches.
Using our custom steels and supplied Alto red 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 weve 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 recalibrated load release springs and pins special to this clutch setup.
The threaded cap is locked into place to prevent spinoff 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. Upgrade cost is $600.00 on Revenger Builds and 400.00 on Beast builds it replaces the sonnax drum on beast build.
4l79 drum it retails for $695.00.
Share this post