SKU: GFCRCG-400
MPN: RCG-400
The G Force Transmission Crossmember RCG-400 is a bolt-on steel support designed specifically for TH400 transmissions in GM G-Body vehicles from 1984 to 1988. This transmission crossmember provides critical structural support for heavy-duty four-speed automatics, preventing transmission movement and drivetrain vibration during acceleration and shifting. The black powder-coated finish offers corrosion resistance for long-term durability in both street and performance applications.
Built from steel and finished with durable powder coating, this crossmember is engineered to handle the load demands of TH400 transmissions—the industry standard for high-torque performance builds. The bolt-on design eliminates welding and allows for straightforward installation on 1984–1988 G-Body platforms. At 29 pounds, the crossmember provides substantial mass to manage vibration and transmission sag without excessive weight penalty. Precise dimensions of 10.5 x 6 x 51 inches ensure proper fitment in the original transmission tunnel and mounting points on these vehicles.
This crossmember is essential for anyone rebuilding a G-Body with a TH400 swap or restoring an original-equipment four-speed installation. Street performance drivers, drag racing enthusiasts, and restoration shops rely on quality transmission support to prevent transmission drop and extend component lifespan. The G-Body platform—including the Chevrolet Monte Carlo, Buick Regal, Pontiac Grand Prix, and Oldsmobile Cutlass Supreme—benefits from reinforced crossmember support when equipped with the robust TH400 transmission.
Transmission crossmembers are foundational to vehicle stability during hard acceleration and gear transitions. The G Force RCG-400 meets the needs of builds where transmission durability and minimal drivetrain movement are priorities.
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