Transfer Case Brace

Features:

• Prevents cracked transmission tail shaft housings
• Ideal for off-road and high torque use
• Reduces stress from driveline vibration
• Helps prevent costly fluid leaks and damage
• Supports heavy transfer case with added bracing
• Distributes load across transmission adapter housing
• Dual 7/8 inch 304 stainless-steel support tubes
• Includes thick 304 stainless-steel center plate
• Quick bolt-on installation with no special tools
• No need to remove transmission or transfer case
• Increases drivetrain strength and longevity
• Fits 2011-2019 GM 2500HD/3500HD Duramax 4x4 trucks

Stop Cracks Before They Start With Real Support

If you’re putting real torque through your Duramax, especially in a 4x4 setup, there’s one weak point that often gets overlooked: the tail shaft housing between the transmission and transfer case. When vibration builds or the transfer case starts to sag from its own weight, that housing can crack, and when it does, you're looking at a fluid leak at best, or full-blown transmission damage at worst. The PPE Transfer Case Brace is a smart upgrade that adds critical support exactly where your drivetrain needs it most. It ties the heavy transfer case back into the transmission's center section, distributing the load and cutting down on flex and stress. Whether you’re off-roading, daily driving with oversized tires, or running hard at the track, this brace gives you added confidence that your drivetrain is protected. It installs easily with hand tools and no need to pull the trans or case, making it one of the most worthwhile weekend upgrades you can do. If you’re serious about keeping your Allison 1000 alive, this brace is a no-brainer.

Engineered To Reinforce A Known Duramax Weak Point

The PPE 129021115 Transfer Case Brace is built to solve a common failure point in 2011-2019 GM HD trucks equipped with the Allison 1000 transmission. In high-stress conditions, the transmission tail shaft housing is vulnerable to cracking due to the unsupported weight and vibration from the transfer case. PPE addresses this issue by linking the adapter housing to the transmission's center section using two 7/8 inch 304 stainless-steel support tubes and a thick stainless-steel bridge plate. This triangulated support structure effectively spreads the load and reduces the chance of fatigue or flex during off-road driving, towing, or high-performance use. The brace bolts on easily with no cutting or special tools required, and there’s no need to remove the transmission or transfer case. The materials are built to last, offering strength and corrosion resistance that match the demands of real-world diesel use. For LBZ, LMM, LML, and L5P Duramax owners looking to reinforce their drivetrain, this upgrade provides peace of mind without compromise.

Fitment: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Designed for 2011-2019 GM 2500HD/3500HD 6.6L Duramax 4x4 trucks
• Cracked tail shaft housings are a common issue on Allison-equipped trucks
• Driveline vibration or transfer case weight can cause housing failure
• Housing cracks can lead to fluid leaks and internal transmission damage
• Repairing a cracked housing requires transmission and transfer case removal
• PPE brace supports the transfer case by redistributing load
• Constructed from 304 stainless steel for long-term durability
• Brace uses dual 7/8 inch tubes and a thick support plate
• Installation does not require removal of drivetrain components
• No special tools needed for installation
• Ideal for off-road, drag racing, or high-torque applications