Merchant Automotive Rear Housing Transmission Support (10186) for 2001 – 2007 Duramax equipped with Allison Transmission

Duramax Transmission Rear Housing Support

The transmission housing on 2001–early 2007 Duramax trucks can crack when excessive driveline vibration occurs. Failing u-joints and improperly balanced driveshafts commonly cause Duramax driveline vibration. The rear housing carries significant weight and relies only on bolts at the back of the transmission for support. That limited support increases stress in high vibration situations.

The Merchant Automotive Transmission Rear Housing Support strengthens this area and helps prevent cracking of the transmission housing. By reinforcing the rear of the Allison transmission, this brace reduces stress caused by vibration and harsh driving conditions.

Heavy-Duty Allison Transmission Housing Support Construction

Merchant Automotive builds this Allison transmission housing support from ⅞” .120” wall thickness DOM mild steel tubing and 3/16” plate steel. This construction provides solid reinforcement without unnecessary complexity. The support features a bright orange finish that adds a clean performance look under your truck.

The plate also features the iconic MA logo to show off your favorite diesel performance parts provider. Together, the tubing and plate design create a rigid structure that supports trucks used in off-road and harsh conditions.

This easy-to-install brace helps prevent housing damage before it happens. Preventing cracking can save hundreds if not thousands of dollars in transmission housing repairs. You can install this brace using basic hand tools and your factory bolts.

Recommended Supporting Upgrades

For even better performance, Merchant Automotive suggests installing the High Performance Motor Mounts and Polyurethane Transmission mount. Strengthening these additional components can further reduce driveline movement and vibration.

Made In The USA

Merchant Automotive manufactures each transmission rear housing support in Zeeland, Michigan. The company uses state-of-the-art robotic welding at its Merchant Automotive facility to ensure consistent quality and strength.