LS Transmission Crossmember for B-Body Engine Swaps
When fitting an LS engine into a 1971 to 1976 B Body chassis, securing the transmission at the correct angle and height is essential to prevent vibration and premature driveshaft wear. This Sure Fit transmission crossmember aligns flawlessly with factory frame rails and uses pre drilled mounting holes to remove the guesswork of custom brackets. Constructed from thick steel plate, it maintains chassis rigidity under high torque loads and protects universal joints from undue stress. By anchoring the gearbox in the ideal orientation, it promotes quieter operation and consistent power delivery at all RPM ranges. Installation is straightforward and requires no welding or fabrication as the crossmember bolts directly into existing mount points.
Precision Engineered Transmission Alignment for LS Swaps
The crossmember is machined to position the LS transmission exactly in line with the driveshaft, eliminating the misalignment that causes vibration and premature universal joint wear. By holding the gearbox at the correct angle relative to the 1971 to 1976 B Body frame rails, it ensures smooth power delivery and quieter operation throughout the entire RPM range. This built-in accuracy removes the need for test fitting and adjustment, so installers spend less time under the car and more time driving. The result is a drivetrain that feels balanced and responsive, even under heavy throttle or during spirited cornering.
Heavy Gauge Steel Build for Rigid Chassis Support
Fabricated from thick steel plate, the crossmember forms a rigid bridge between the frame rails, resisting twist under high torque loads. This reinforcement preserves the original handling balance of your B Body chassis by keeping suspension geometry consistent, even when you apply the power aggressively. The robust steel construction stands up to competitive driving and repeated stress without bending or warping. Over time, this solid foundation maintains structural integrity and prevents the flex that can lead to handling vagueness or uneven tire wear.
OEM Mounting System That Requires No Welding
Designed to bolt directly into existing mounting points, the crossmember uses factory-drilled holes in the frame rails of 1971 to 1976 B Body models. This approach eliminates custom brackets and special tooling, letting you complete the LS engine swap with basic hand tools. Detailed instructions guide you step by step, making the install accessible for both seasoned shops and enthusiastic first-timers. The direct bolted connection preserves frame strength and ensures a secure fit without the complexities of cutting, welding, or fabrication.
Durable Protective Finish Resists Corrosion
Every steel surface is treated with a robust protective coating to guard against rust and environmental damage over years of service. This barrier shields the crossmember from moisture, road salt, and debris, extending its service life and maintaining the integrity of your transmission mount. Even under demanding winter conditions or coastal climates, the finish stays intact and continues to block surface deterioration. Routine inspections and a quick wash keep the protective layer performing at its best, so your investment remains reliable mile after mile.
Enjoy solid chassis support and precise alignment for your LS swap. For a Related CRS product see our 1958-1964 B-Body Sure-Fit Crossmember (Only).