The DIY NP241 Standard Strongbox underdrive by Behemoth Drivetrain is engineered for extreme strength, low weight, and incredible performance.  This DIY model is case only - allowing you to choose and install your own gears.

Gear Compatibility: The NP241 Standard Strongbox DIY case is designed to be compatible with NP231, NP233, NP236, NP241, NP243 and NP246 series gears.  These cases do not work with NP242 gears.  Coming soon we will be offering both fully geared versions of this Strongbox, as well as a 4:1 Rubicon version.  

Billet Aluminum over Cast: Instead going cheap by using cast aluminum – which can be weakened by air pockets and the  repeated heating and cooling cycles of the casting process – we manufacture the Strongbox from solid Billet 6061 aircraft grade aluminum.  If strength, performance and durability are a priority – there’s no question billet is the way to go.

Hardened Steel for Extreme Reliability:  The Strongbox shifter assembly utilizes case hardened steel designed to hold up against the most aggressive shifting and extreme conditions.  The Ranger Standard Strongbox shaft is made from exceptionally hard 4340 alloy steel that is heat treated to provide incredible strength.  Throw anything you can at this shaft – you’ll break before it does…

Engineering and Compatibility Support:  Have questions about compatibility or specific technical questions for your build?  Give our team a call at (855) 928-1984 and one of our staff engineers will gladly help step you through aspect of compatibility and the build process you need.

WHOLESALE BUILDERS PROGRAM:  Are you a vehicle builder or design/fab shop?  We have a wholesale program just for builders!  Click HERE to get more info on our wholesale program and receive discounts off retail, additional engineering support, custom options, cash back and more.