LS Transmission Crossmember for 1965-1970 B-Body Impala/Caprice
Installing an LS transmission in a 1965 to 1970 Impala or Caprice convertible often requires cutting the floor and fabricating custom brackets to achieve proper driveline positioning. This transmission crossmember eliminates those steps by dropping into the factory frame rails for precise tailshaft angle and length without altering the transmission tunnel. Its durable steel construction follows the original frame contour to preserve interior floor height while supporting 700R4 4L60 and TH350 units with consistent alignment. As a builder you can shift focus from welding brackets to wiring and plumbing and trust that chassis rigidity remains intact for confident highway driving and spirited back road runs.
Precision Engineered for Exact LS Transmission Position
This crossmember is crafted to seat the LS transmission exactly where it belongs in a 1965 through 1970 Impala or Caprice frame. By matching the original rail contour, it aligns the tailshaft at the factory riding height and correct driveline angle without raising or lowering the engine. The design removes any need to cut the floor or fabricate brackets, preserving the integrity of the interior tunnel. Builders gain confidence that the driveshaft will engage smoothly and that universal joint angles remain within safe limits for both daily driving and spirited road work.
Reinforced Steel Framework for Enhanced Chassis Stability
Constructed from high grade steel plate, this crossmember adds a stout central bracing point under the transmission tunnel. The robust plate resists bending and twisting forces under torque loads, reducing flex that can lead to driveline lash and premature joint wear. Increased rigidity translates into sharper turn in response and consistent steering feedback, even when the engine is pushed hard. Overall vehicle dynamics improve, so drivers will notice firmer body control in corners and a more planted feel at highway speeds.
Streamlined Bolt In Installation Without Tunnel Modification
Installation is a straightforward bolt in process that slips into the factory frame rails without altering the transmission tunnel. Pre located mounting holes line up precisely, allowing the included hardware to secure the crossmember in minutes. Minimal alignment tweaks ensure a true fit so builders can shift their focus to wiring harnesses, fuel lines and plumbing. By eliminating chase for bracket fabrication, shops and home garages save time and avoid trial and error for a clean install.
Versatile Fitment for Popular GM Automatic Gearboxes
This crossmember supports 700R4, 4L60 and TH350 transmissions with no tunnel changes required, making it ideal for most LS conversion projects. Its dimensional accuracy holds the tailshaft housing at the designed angle to maintain correct driveshaft length and joint alignment. Even when upgrading to a heavier overdrive unit, only minor shims are needed to clear the frame rails. The result is a flexible platform that lets enthusiasts swap or upgrade gearboxes without complex custom brackets or frame cutting.
Built to deliver precise driveline positioning and chassis stability. For a related CRS product see our 1958-1964 B-Body Sure-Fit Crossmember (Only).