GMC Sierra 3500HD Transfer Case Brace - Wehrli - Gloss Black - 2011–2019. Purpose-built reinforcement that ties the Allison transmission to the transfer case on LML/L5P Duramax platforms to help control driveline movement.

Developed and tested for high-horsepower and hard-use trucks, this brace reduces driveline flex common in off-road, pulling, and drag scenarios. By spreading the transfer case load across the transmission center section, it helps mitigate cracked tail housings, fluid leaks, and expensive repairs that can result from u-joint or driveshaft issues. The fabricated tubular steel support installs with basic hand tools, requires no transmission or transfer case removal, and uses existing OEM fasteners. Finished in a durable gloss black single-stage powder coat.

Features

• For 2011–2019 Duramax LML/L5P with Allison transmission
• Spreads transfer case load across transmission center section
• Reinforces tail housing to reduce flex; helps prevent cracks and leaks
• Fabricated tubular steel; gloss black single-stage powder coat
• Installs with basic tools; no drivetrain removal; uses OEM fasteners

Questions or need guidance on your build? Call our specialists in Austin, TX at 512-982-9393 or in the Los Angeles, CA area at 562-981-6800. We offer installation and customization services at both locations.

Buying multiple items? Contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov