Merchant 10186 Transmission Rear Housing Support | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Fits 2001-2007 GM 2500HD/3500HD 6.6L Duramax
• Compatible with 8.1L engine models
• Designed for Allison 4x4 transmissions
• Helps prevent rear housing cracking
• Protects against driveline vibration damage
• Ideal for trucks with worn u-joints
• Recommended torque specs included
• Easy to install on existing transmission

Reinforce Your Allison Transmission Before It’s Too Late

If you’ve ever dealt with a cracked transmission housing, you know just how expensive and frustrating that repair can be. The Merchant 10186 Transmission Rear Housing Support is a simple and effective way to prevent that problem before it starts. Designed for 2001-2007 GM Silverado and Sierra 2500HD and 3500HD models with the 6.6L Duramax or 8.1L gas engine, this support braces the rear housing of your Allison 4x4 transmission to reduce stress and movement. It’s especially useful if your truck has experienced driveline vibrations from worn u-joints or a slightly bent driveshaft—common issues that can put extra strain on your transmission housing over time.

Designed for Long-Term Durability and Easy Installation

Installing this rear housing support is an easy step that can save you from costly repairs down the road. Merchant includes torque specifications—35 ft-lbs at the transmission and 27 ft-lbs at the transfer case—so you know you’re securing it correctly without guesswork. Once in place, this support helps stabilize the rear section of your transmission, improving drivetrain durability for both daily drivers and hard-working tow rigs. If you’re already addressing driveline vibrations or just want added peace of mind, this is a smart upgrade to add to your preventative maintenance list.

Fits: 2001, 2002, 2003, 2004, 2005, 2006, 2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax