Bore out service - D300 Retainer Transfer Case A completely geared Colossus weights

A completely geared Colossus weights in at only 72 pounds

The DIY Colossus Billet NP205 replacement case by Behemoth Drivetrain is engineered for extreme strength

The Ranger Shorty Strongbox underdrive by Behemoth Drivetrain is engineered for extreme strength

and incredible performance

Available in Dana 30-based (E30) and Dana 44-based (E40) configurations

Bore out service - D300 Retainer Transfer Case A completely geared Colossus weightsIf you are upgrading your Dana 300 from a stock 26 spline front output shaft to a 32 spline, you need to bore out your input retainer to fit the upgraded larger shaft. For customers that are not able to do this on their own, or do not have access to a machine shop, Behemoth Drivetrain offers bore out service for these retainers. The service works for both the Behemoth Drivetrain model 32 spline shaft and the JB Conversions 32 Spline front output.