LS Engine Transmission Crossmember for GM B-Body Vehicles
When an LS engine lands in a 1971 to 1976 GM B-Body chassis, proper transmission positioning becomes critical and this crossmember delivers exactly what the swap demands. Precision cut steel plate links the frame rails at the ideal height and angle to lock the gearbox in line with the driveshaft and eliminate fitment guesswork. Bolting into the factory mounting points without welding or cutting saves hours in the garage and preserves chassis integrity. This drivetrain alignment solution ensures quiet highway manners under load and long lasting support for spirited driving.
Transmission Angle and Driveshaft Alignment for LS Swaps
The crossmember is precision machined to hold the gearbox at the ideal height and angle relative to the 1971 to 1976 B Body frame rails, eliminating alignment guesswork. By securing the transmission in perfect relation to the driveshaft, vibration at the universal joints is minimized and wear on couplings is reduced. Installers benefit from exact angle and height specifications that prevent repeated test fits and help achieve quiet operation under load. The result is a drivetrain that delivers power smoothly across the entire rpm range and allows spirited drivers to push performance without concern for component fatigue.
Structural Steel Reinforcement to Prevent Chassis Twist
Built from thick, superior grade steel plate, this crossmember doubles as a rigid bridge between the frame rails, resisting torque spikes during hard launches and aggressive cornering. The added stiffness maintains proper suspension geometry, so steering response stays crisp and tire wear remains even through demanding use. In track or street scenarios alike, the chassis retains its intended shape under stress, preserving handling precision mile after mile. The robust design also guards against flex that can compromise fitment of surrounding brackets and bracketry when the power is turned up.
Bolt In Fitment to Preserve Frame Integrity
Pre drilled holes align perfectly with factory mounting points on 1971–1976 B Body models, allowing a true bolt in install without cutting or welding. Common hand tools are all that’s required and the included step by step instructions guide even first time installers from start to finish in just a few hours. By avoiding frame modification, the original structure remains untouched, eliminating worries over heat distortion or the need for additional reinforcements. This direct mount approach also makes future service or removal straightforward, preserving the chassis for decades of use.
Seamless LS Integration for Optimized Power Delivery
Designed specifically for LS engine swaps, the crossmember ensures seamless integration with modern powerplants and compatible transmissions. The precise chassis interface positions the gearbox to reduce driveshaft angle, which in turn lowers stress on U-joints and improves reliability under acceleration. With the transmission locked solidly in place, power pulses are transmitted more consistently to the rear wheels, preventing drivetrain lash and enhancing throttle response. The overall result is confident highway cruising and reliable performance when pushing on back roads or the strip.
Count on precise fitment and lasting support from this transmission crossmember. To complement your installation consider our 1958-1964 B-Body Sure-Fit Crossmember (Only) as a related CRS product.