LS Transmission Crossmember for F-Body
Installing an LS transmission in a 1970-1981 F-Body demands precise alignment and solid support. The 1970-1981 F-Body Sure-Fit Crossmember Only secures to original frame mounts, removing the need for cutting or welding and reducing fitment headaches. Constructed from durable steel, it holds the engine and transmission firmly under heavy loads and rough road conditions. For both 4L60E and 4L80E transmissions it offers direct fitment without tunnel changes.
Tailored Alignment for 1970 through 1981 F Body LS Engine Conversions
This crossmember is custom formed to the factory mount points on 1970 through 1981 F Body frames, removing the need for cutting or welding. By matching original frame rail holes, it positions the LS engine and transmission with precision, preserving driveline geometry and reducing vibration. Installers can trust consistent centering of the powertrain, which leads to smoother power delivery and less stress on related components. Whether you own a classic Camaro or Firebird, this solution streamlines the integration process.
Rugged Steel Structure for Reliable Track and Street Use
Constructed from heavy gauge steel, the crossmember provides the strength required to support LS engine weight and torque under demanding conditions. Its robust design resists twisting and flex during high-speed cornering and hard braking, keeping the motor and gearbox firmly in place. Consistent alignment of driveline angles also protects u-joints and mounts from premature wear. The result is a durable foundation that performs equally well on daily drives and track outings.
Seamless Bolt In Fit for 4L60E and 4L80E Transmissions
This crossmember accommodates both 4L60E and 4L80E units with direct bolt in compatibility, eliminating complex tunnel modifications. Precision-punched mounting holes align perfectly with transmission flanges for a drop-in installation, saving time on fabrication and fitment checks. Installers can use factory fasteners or the supplied hardware to secure the assembly, making the underbody layout clean and straightforward. Fewer steps mean a quicker path from assembly to the road.
American Craftsmanship Delivering Consistent Quality
Manufactured in the USA under strict quality controls, each crossmember meets tight tolerances for reliable fit and function. Domestic sourcing of steel and state of the art fabrication processes ensure repeatable performance across every unit. This commitment to local production not only supports skilled labor but also gives owners confidence in a part built to last. The result is a product you can trust for years of street and track service.
For a Related CRS product see our 3rd Gen F-Body Crossmember (Only) 4L60E. You can trust its precision fit and reliable construction.