4:1 Rubicon Standard Strongbox d3rearoutputoption Behemoth Drivetrain offers bore out

Behemoth Drivetrain offers bore out service for these retainers

The APEX Dana 300 DIY cast aluminum replacement case by Behemoth Drivetrain is engineered for extreme strength

Fluid Type: High-RPM EV-rated ATF

Combine your APEX with a Behemoth Strongbox to get an unbeatable 4 speed case

Whether used in a custom EV conversion

4:1 Rubicon Standard Strongbox d3rearoutputoption Behemoth Drivetrain offers bore outBillet 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 theres no question billet is the way to go. Hardened Steel for Extreme Reliability: The Strongbox shifter assembly utilizes case hardened steel