2001-2007 GMT800 Chevy GMC Transfer Case Brace GM Duramax Diesel LB7 LLY LBZ

Circuit Werks Transmission Transfer Case Brace Maximum Reinforcement for GM Allison-Equipped 4x4 Duramax Trucks Cracked tail shaft housings are one of the most common—and expensive—failures for high-horsepower, off-road, and drag racing Duramax trucks. The massive, overhanging transfercase combined with even mild driveline vibration can snap the aluminum housing like glass, leading to severe fluid leaks, internal gear destruction, and hours of teardown. The Circuit Werks Fix: Our Heavy-Duty Transfer Case Brace acts as a structural backbone, tying the transfer case directly across the adapter housing into the center section of the transmission. It distributes high-torque load and dampens vibration before it ever reaches the factory housing. Key Features: Prevents Housing Failure: Built specifically to withstand launch-pad shock loads, sled-pulling stress, and rough off-road abuse. Premium 304 Stainless Steel: Constructed with twin 7/8” 304 stainless-steel support tubes tied together by a thick, heavy-duty 304 stainless plate for ultimate rigidity and lifetime corrosion resistance. Direct Bolt-On Prep: Installs in your driveway—no need to drop the transmission or transfer case, and no special tools required. Protects Your Investment: Saves thousands in repair costs, down time, and tow bills. Vehicle Fitment: 2001–2006 Chevrolet Silverado 2500HD / 3500HD (6.6L Duramax LB7 / LLY / LBZ) 2007 Chevrolet Silverado 2500HD Classic (6.6L Duramax LBZ) 2007 Chevrolet Silverado 3500 Classic (6.6L Duramax LBZ) 2001–2006 GMC Sierra 2500HD (6.6L Duramax LB7 / LLY / LBZ) 2001-2006 GMC Sierra 3500 (6.6L Duramax LB7 / LLY / LBZ) 2007 GMC Sierra 2500 HD Classic (6.6L Duramax LBZ) 2007 GMC Sierra 3500 Classic (6.6L Duramax LBZ) Tech Note: 8th Vin Digit is 1, 2, or D GMT800 Body Style Allison Transmission 4x4 (Does NOT fit 2wd) LB7 LLY LBZ ONLY ⚠️ If you or someone has done a engine/transmission swap to your vehicle these guidelines will not apply