ARB 4X4 Accessories AAM 760 Air Locking Differential, Front 28 Spline RD148 For Use With 28 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 GMC HUMMER CANYON COLORADO H3 ALPHA BASE CHAMPIONSHIP SERIES LS LT SL SLE SLT WT X 2006 2007 2008 2009 2010 2011 2.8L LK5 (2770cc) 2.9L LLV Vortec (178) 3.5L (3460cc) 3.5L L52 (3460cc) 3.7L LLR Vortec (223) 5.3L GEN IV LH8 Vortec (325) 5.3L GEN IV LH9 Vortec (325) GAS ARB 4x4 Accessories ARB AAM 760 Air Locking Differential - RD148 RD148 Differentials