Sure-fit LS Transmission Crossmember for Tri-5
If you're tackling an LS swap in a 1955 to 1957 Chevy Tri-5 chassis the Sure-fit Crossmember (Only) Tri-5 secures the transmission beneath the factory frame rails without any custom brackets. Made from high-strength steel it locks the transmission into accurate alignment resists flex under torque and keeps driveline angles in check to limit vibration and wear. Installation uses original frame holes on non convertible models so builders can move from chassis prep to tuning with minimal adjustments. It also maintains factory ground clearance and ride height so the Tri-5 stance remains factory correct while cutting hours from the install process.
Maintaining Precise Engine Alignment
The Sure-fit crossmember positions the LS transmission at factory specified angles relative to the frame rails of 1955 to 1957 Chevrolet chassis. This accuracy reduces driveline vibration and keeps universal joints operating within their optimal range, which lowers coupling stresses and prevents premature wear. By holding the gearbox true under acceleration and braking loads, it also ensures consistent shift quality and smoother power delivery. Over extended use, drivers will notice reduced noise and improved response as chassis geometry remains stable during spirited operation.
Withstanding Engine Torque through Robust Steel Construction
Built from premium thick gauge steel, the crossmember absorbs the high torque output of modern LS engines without bending or cracking. Welded reinforcements at key stress points distribute loads evenly across the frame rails, preventing localized fatigue even under repeated launch conditions. Its rigid structure safeguards both the chassis and transmission housing from distortion, ensuring long service life for mounting points and bushings. Whether on the street or the strip, this design offers consistent durability mile after mile.
Exact Geometry for 1955 to 1957 Chevrolet Frame Integration
Every contour of this crossmember is shaped to match the factory rail profile found on 1955 to 1957 Chevrolet non convertible models. It preserves original ground clearance and ride height by aligning flush beneath the chassis without grinding or trimming. Maintaining the stock profile allows builders to retain the classic undercar appearance while accommodating a range of LS transmissions. This tailored approach eliminates guesswork, ensuring installers can pursue tuning rather than fitment corrections.
Efficient Step by Step Bolt In Installation
The design leverages existing frame holes and requires no cutting, drilling or welding, allowing the crossmember to bolt in using supplied hardware and clear instructions. Builders of any experience level can follow the step by step procedure with basic tools, shaving hours off a traditional custom bracket fit. This streamlined process moves the project rapidly from chassis prep to engine tuning, reducing labor costs and downtime. The result is a seamless transmission swap that preserves factory mounting simplicity.
Built for precise alignment and robust support this crossmember ensures dependable performance in your LS swap.