GM Adjustable trans Mount

The GM Adjustable Transmission Mount by G FORCE CROSSMEMBERS is a critical drivetrain component engineered for builders and enthusiasts who demand precision engine tuning and reduced drivetrain slop. This adjustable trans mount addresses the inherent compliance in factory rubber isolators, which compress and shift under load, introducing unwanted play between the transmission and chassis. Whether you're running a stock rebuild, a mild street engine, or preparing for serious performance work, controlling transmission movement eliminates parasitic losses and improves shift quality by maintaining rigid drivetrain geometry.

G FORCE CROSSMEMBERS engineered this mount with adjustability as the core feature, allowing technicians to fine-tune transmission placement and preload to match engine bay geometry and power delivery characteristics. The compact design—measuring 4.6 x 4.4 x 4.75 inches and weighing just 2.07 lbs—integrates seamlessly into OEM and modified crossmembers without requiring extensive fabrication. The adjustable mechanism permits vertical and lateral correction, critical when combining aftermarket engine blocks, cylinder heads, or modified intake manifolds that shift powerplant position. This flexibility ensures proper driveshaft alignment and eliminates binding during throttle transitions, while solid mounting reduces vibration transmission to the chassis and improves overall refinement.

Mechanics and engine builders working on General Motors platforms—from street rods to modern LS-swapped chassis—rely on this component to dial in transmission geometry after major powertrain modifications. Installation requires basic hand tools and is compatible with both manual and automatic transmissions, though exact mounting points depend on your specific GM platform and crossmember configuration. Proper adjustment during assembly ensures driveshaft U-joint angles stay within acceptable ranges, reduces transmission case stress, and prevents catastrophic failures under hard acceleration or dynamic cornering. This mount pays dividends on any build seeking durability, precision, and reduced drivetrain noise.