1965-1970 B-Body LS Transmission Crossmember for Impala/Caprice
Positioning an LS transmission in a 1965 to 1970 Impala or Caprice convertible often requires cutting the floor and custom mounting. This crossmember for Impala and Caprice convertibles eliminates those extra steps by dropping into the factory frame rails and aligning the driveline exactly where it belongs. Its sturdy steel construction supports 700R4, 4L60 and TH350 transmissions without tunnel modifications for a straightforward installation. By matching the original frame contour it preserves interior floor height and precise driveline angle for confident highway cruising and spirited runs on back roads.
Effortless Bolt-In Installation and Alignment
The crossmember is designed for a true bolt-in fit that drops into the factory frame rails without cutting the floor or altering the transmission tunnel. Prelocated mounting points require only minimal alignment tweaks, cutting installation time and reducing trial and error. Included hardware ensures the component seats precisely at the factory riding height while preserving cab floor contours. This straightforward process lets builders focus on wiring and plumbing instead of complex structural modifications.
Versatile Transmission Accommodation
Engineered to accept 700R4, 4L60 and TH350 transmissions, this crossmember provides a platform for most popular automatics used in LS engine conversions. Its dimensional accuracy positions the tailshaft housing at the correct angle to maintain driveshaft length and universal joint angles. Even when installing a heavier overdrive unit such as a 4L80E, only minor shims or bracket tweaks are needed to clear the frame rails. This flexibility allows enthusiasts to swap or upgrade gearboxes without fabricating custom mounts.
Optimized Chassis Dynamics and Handling
Constructed from sturdy steel plate, the crossmember enhances overall frame rigidity and resists bending under torque loads. By anchoring the transmission at a precise point, it reduces drivetrain lash and vibration that can disrupt steering feedback and cause premature joint wear. The improved stiffness delivers more predictable cornering behavior and limits body roll during spirited maneuvers. Drivers will notice a firmer feel and increased confidence whether cruising the highway or attacking a winding road.
For a Related CRS product see our 1958-1964 B-Body Sure-Fit Crossmember (Only). It shares the same tight tolerances and delivers dependable support for your LS installation.