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  • Merchant 2001-2007 LB7/LLY/LBZ Transmission Rear Housing Support, Transfer Case Brace - MAT10186

Merchant 2001-2007 LB7/LLY/LBZ Transmission Rear Housing Support, Transfer Case Brace - MAT10186

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SKU: MAT-10186


Duramax Transmission Rear Housing Support
The transmission housing on 2001-early 2007 Duramax trucks are prone to cracking in the event of excessive driveline vibration. Duramax driveline vibration is commonly caused by a failing u-joint or an improperly balanced driveshaft. This housing is very heavy and is only supported by being bolts to the back of the transmission. This Merchant Auto Transmission Rear Housing Support helps to strengthen this area and prevent cracking on the transmission housing.


This Allison transmission housing support is made from ⅞” .120” wall thickness DOM mild steel tubing and 3/16” plate steel. It is finished in a bright orange finish to add a great look to your truck. The plate also features our iconic MA logo to show off your favorite diesel performance parts provider. This combo makes for a solid support that will aid in supporting trucks used in off-road and harsh conditions. This easy-to-install brace can help save hundreds if not thousands of dollars in damage by preventing the housing from cracking. This brace installs with basic hand tools and your factory bolts.


To give your truck even better performance, we suggest installing our Merchant Automotive High Performance Motor Mounts and Polyurethane Transmission mount.


Made In The USA

Each transmission rear housing support is manufactured using state-of-the-art robotic welding at our Zeeland, Michigan Merchant Automotive facility. 



  • Prevents Transmission Housing From Cracking
  • Fabricated In House
  • Easy To Install


  • 3/16” Plate Steel
  • ⅞” 0.120” Wall Thickness
  • Bright Orange Finish

What's In The Box

  • 1 Rear Housing Support

Click here to view the installation video.

Click here to view the Truck U segment on the MA Rear Support Brace.

Click here to view the Two Guys Garage segment on the MA Rear Support Brace.

Click here to see the MA fabricated Motor Mounts.

Click here to see the MA Polyurethane Transmission Mount for 2001-2010 trucks or click here for 2011-2016 trucks.


2001_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2001_Chevrolet_Silverado 3500_6.6L DIESEL, 2001_GMC_Sierra 2500 HD_6.6L DIESEL, 2001_GMC_Sierra 3500_6.6L DIESEL, 2002_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2002_Chevrolet_Silverado 3500_6.6L DIESEL, 2002_GMC_Sierra 2500 HD_6.6L DIESEL, 2002_GMC_Sierra 3500_6.6L DIESEL, 2003_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2003_Chevrolet_Silverado 3500_6.6L DIESEL, 2003_GMC_Sierra 2500 HD_6.6L DIESEL, 2003_GMC_Sierra 3500_6.6L DIESEL, 2004_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2004_Chevrolet_Silverado 3500_6.6L DIESEL, 2004_GMC_Sierra 2500 HD_6.6L DIESEL, 2004_GMC_Sierra 3500_6.6L DIESEL, 2005_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2005_Chevrolet_Silverado 3500_6.6L DIESEL, 2005_GMC_Sierra 2500 HD_6.6L DIESEL, 2005_GMC_Sierra 3500_6.6L DIESEL, 2006_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2006_Chevrolet_Silverado 3500_6.6L DIESEL, 2006_GMC_Sierra 2500 HD_6.6L DIESEL, 2006_GMC_Sierra 3500_6.6L DIESEL, 2007_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2007_GMC_Sierra 2500 HD_6.6L DIESEL

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