Chrysler A/B-Body Trans Mount 66-72

The Chrysler A/B-Body Trans Mount 66-72 is a polyurethane transmission mount replacement engineered for classic Chrysler A-body and B-body vehicles built between 1966 and 1972. This mount is essential for any serious restoration, street build, or performance upgrade on platforms including the Dodge Charger, Plymouth Road Runner, Chrysler Valiant, and Dodge Dart. If you're rebuilding a vintage Mopar drivetrain or installing a more powerful engine variant, a quality trans mount is non-negotiable for durability and drivability.

PROTHANE's polyurethane formulation significantly outperforms original rubber mounts, which harden and crack over decades of thermal cycling and engine torque stress. Polyurethane resists heat, oil, and UV degradation far longer than factory elastomer, maintaining consistent damping characteristics throughout the mount's service life. The engineered durometer (hardness rating) balances vibration isolation with minimal deflection under load—critical when you're transferring horsepower through a vintage transmission to a solid rear axle. This mount also withstands the additional stress common in modified applications, whether you're running a rebuilt original engine or swapping in a period-correct performance block.

Installation is straightforward on any 66-72 A/B-body with stock or lightly modified engine bay geometry; the compact 4.25 x 3.1 x 4.8 inch footprint ensures fit within OEM mounting points. This upgrade is ideal for owners replacing worn factory mounts during a frame-off restoration, upgrading a driver-quality build, or preparing a platform for future modifications. Compatibility spans all A-body and B-body Mopar lines from this era, making it a universal solution for the classic Chrysler collector or performance enthusiast seeking reliability and longevity over original equipment.