; HomeHeavy Duty Truck PartsEngines & Engine PartsEngine AssysCaterpillarOtherUsed 1996 CAT 3406E (40 PIN) 5EK 1LW 6TS 5DS Engine Assy Used 1996 CAT 3406E (40 PIN) 5EK 1LW 6TS 5DS Engine Assy Unfortunately this part is temporarily unavailable. View other Caterpillar Other Engine Assys