4L79 Drum Kit

 RIGIDITY and the MASSIVE amount of new clutch surface area are what you get, creating a  3-4 clutch pack comparable to nothing else available. The input housing itself is machined and threaded to accept the threaded 6061 billet aluminum end cap, retained from spinoff by the 5 allen set screws provided. The inside of the drum being machined larger, allows the larger diameter clutch pack to be installed. By making the top cap of aluminum, it further helps shed the dreaded heat from the 3-4 clutch pack better than steel. The kit utilizes 8 custom frictions, a custom bottom pressure plate and 8 matching steels that all have an increased outside diameter. The larger steels equate to more steel mass as well, further aiding in heat dissipation. Recommended for anything 600+ hp,  but is a HD option for any long lasting build.

4L79 is patented

What's included:     

Input drum housing   

6061 Billet thread on top cap

8  Custom frictions

8  Custom  steels    

Custom bottom pressure plate

5  Allen set screws

  *FOLLOW INSTRUCTIONS*

*NO SPECIAL PARTS REQUIRED TO INSTALL*
$569.00 +shipping

*Shops and tax exempt Rebuilders please call for better pricing


* Note* At checkout please note if you want a bare drum or we will Loctite and press in an OEM 298mm or 300mm shaft at no charge, 300mm reluctor version is $45 extra, only for the shaft itself.  No charge to press Sonnax input housing sleeve or billet input shafts if purchased separately.  

Our 4L78 version is similar in comparison to our 79 version as far as construction, rigidity and cooling properties, however it still utilizes OEM size frictions and steels. Safely rated for 600hp and lower builds.

What's included: 

Input drum housing    

6061 Billet thread on top cap    

New bottom pressure plate

8   Raybestos Red frictions

8   New steels

5   Allen set screws

10  load release springs 

   *FOLLOW INSTRUCTIONS*

*NO SPECIAL PARTS REQUIRED TO INSTALL* 

$ 449.00 +shipping

Shops and tax exempt Rebuilders please call for better pricing





* Note* Please note at checkout if you want a bare drum or we will Loctite and press in an OEM 298mm or 300mm shaft at no charge, 300mm reluctor version is $45 extra, only for the shaft itself. No charge to press Sonnax input housing sleeve or billet input shafts if purchased separately.
 

 
Our 4L75 version still utilizes snapring retention of the 3-4 clutch pack, but uses 7 of our larger custom frictions, custom steels, as well as top and bottom custom pressure plates.

*NO SPECIAL PARTS REQUIRED TO INSTALL*

$400.00  +shipping 

Shops and tax exempt Rebuilders please call for better pricing





* Note* Please note at checkout if you want a bare drum or we will Loctite and press in an OEM 298mm or 300mm shaft at no charge, 300mm reluctor version is $45 extra, only for the shaft itself. No charge to press Sonnax input housing sleeve or billet input shafts if purchased separately.