A worn factory transmission mount lets the Allison move around under load, and you feel it as vibration, driveline clunk, and sloppy shifts, especially when towing heavy or driving hard. The PPE 169044150 Performance Transmission Mount replaces the stock rear mount on 2011-2019 LML and L5P Duramax 4WD trucks with a stronger dual-silicone design that holds the transmission firmly to the chassis.

This is the green version, with 50A durometer bushings. It sits in the middle of PPE's range, firm enough for off-road and towing use while still comfortable on the street.

What you get:

• One PPE performance rear transmission mount with green 50A silicone bushings
• Dual-bushing design that spreads the load and cuts down on the shear stress that wears out stock mounts
• About 30% more steel-to-elastomer contact area than the factory mount, so each square inch of rubber carries less load
• Premium silicone that resists heat, weather, and tearing
• Replaceable bushings that can be swapped for PPE's purple (30A street) or red (70A drag) hardness later
• Fits 2011-2019 Chevrolet Silverado and GMC Sierra 2500HD/3500HD 6.6L Duramax 4WD with the Allison transmission

Specs:

• Bushing hardness: 50A durometer (green)
• Bushing material: silicone
• Drive: 4WD

It's a good fit for LML and L5P owners who tow, wheel their truck, or run more power and want to stop the transmission from shifting around on a tired mount. Verify fitment for your truck before ordering.