BD Diesel Valve Body - 2004-2006 Duramax LLY Allison 1000 1030471

BD's exchange valve bodies are modified, tuned and tested to provide optimum performance in towing and performance applications. These units feature revised valve design, new springs, larger oil ports and proprietary governor piston dimensions. Hand-lapped surfaces prevent internal leakage, while new trim valves increase mainline pressure. The end result is improved shift quality, increased clutch holding capacity, reduced friction and extended transmission life.