ARB 4X4 Accessories Land Rover Banjo P38A Air Locking Differential, Rear 24 Spline RD139 For Use With 30 Spline Axles;For Use With All Ratios;Air Activated Selectable Locker; Converts From Open Differential To fully Locked Or Spool; Simple Push Button Operation; Requires Air Compressor Sold Separately CHEVROLET DODGE GMC RAM 2500 RAM 3500 SIERRA 2500 SIERRA 2500 HD SIERRA 2500 HD CLASSIC SIERRA 3500 SIERRA 3500 CLASSIC SIERRA 3500 HD SILVERADO 2500 SILVERADO 2500 HD SILVERADO 2500 HD CLASSIC SILVERADO 3500 SILVERADO 3500 CLASSIC SILVERADO 3500 HD BASE CLASSIC LS CLASSIC LT CLASSIC SL CLASSIC SLE CLASSIC SLT CLASSIC WT LARAMIE LS LT LTZ POWER WAGON SL SLE SLT SPORT ST SXT TRX4 WT 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 5.7L Hemi (345) 5.7L Hemi EZC (345) 5.9L (359) 6.6L Duramax Turbo Diesel LB7 (403) 6.6L Duramax Turbo Diesel LBZ (403) 6.6L Duramax Turbo Diesel LLY (403) 6.6L Duramax Turbo Diesel LMM (403) 6.7L Cummins Turbo Diesel HO (408) 6L GEN III Bi-Fuel LQ4 Vortec (364) 6L GEN III CNG LQ4 Vortec (364) 6L GEN III LQ4 Vortec (364) 6L GEN IV LY6 Vortec (364) 8.1L L18 Vortec (496) 8L Magnum (488) BI-FUEL CNG DIESEL GAS ARB 4x4 Accessories ARB AAM 11.5 Inch Air Locking Differential - RD139 RD139 Differentials