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Vehicle Info NeededAT-0056B Bolt-on Transmission Crossmember (6 in. drop)
Ships on 09/14/2026
Lowest Price Guarantee- Bolt-on Transmission Crossmember (6 in. drop)
Chassis Engineering AT-0056B Features:
Chassis Engineering AT-0056B comes as a Bolt-on Universal Transmission Crossmember with a 6 in. drop.
Chassis Engineering Transmission Crossmember tubes are internally reinforced, heavy duty 1 3/4 in. OD tubing with a 1/8 in. wall.
We recommend using these with side engine mounts only, to avoid stressing the bell housing.
Our universal transmission crossmembers will fit most standard or automatic transmissions with rear mounting, and are available in both a Bolt-on and a Weld-on option, each available with 5 separate drops and can be cut to the width you need to fit your frame.
AT-0050B Bolt-on Transmission Crossmember with 0 in. drop
AT-0052B Bolt-on Transmission Crossmember with 2 in. drop
AT-0054B Bolt-on Transmission Crossmember with 4 in. drop
AT-0056B Bolt-on Transmission Crossmember with 6 in. drop
AT-0058B Bolt-on Transmission Crossmember with 8 in. drop
AT-0050W Weld-on Transmission Crossmember with 0 in. drop
AT-0052W Weld-on Transmission Crossmember with 2 in. drop
AT-0054W Weld-on Transmission Crossmember with 4 in. drop
AT-0056W Weld-on Transmission Crossmember with 6 in. drop
AT-0058W Weld-on Transmission Crossmember with 8 in. drop
However, we do have a collection of car and transmission specific crossmembers, so before going the universal route, check and see if we have one available for your setup. If we do, it will save you a bit of fabrication work.
For Ford Cars and Pickup Trucks, have a look here:
For Chevrolet Cars and Pickup Trucks, check here:
Don't forget to include a transmission cushion with your order:
SS-0112 for 4speed, PowerGlide and Turbo 350 transmissions
SS-0114 for Turbo 400 and Turbo 700 transmissions
SS-0212 for Ford C4 transmissions
How to determine which universal transmission crossmember to use:
1. Mock up the engine mounting location using Chassis Engineering mounts.
2. Mock up the transmission placement, aiming for approximately a 2-4 degree downward angle of the tailshaft.
3. Measure from the bottom of the transmission cushion to approximately the center of the frame.
This will roughly correspond to the transmission drop. This €œdrop€ is measured from the top of the transmission crossmember tube to the top of the mounting plate.
Chassis Engineering Transmission Crossmembers – Precision Fit Strength For Hot Rod And Custom Builds
Chassis Engineering Transmission Crossmembers are designed to provide durable support, precise drivetrain positioning, and simplified installation for hot rods, street rods, classic cars, and custom chassis applications. Built from high-quality steel construction, these transmission crossmembers deliver exceptional structural integrity while helping reduce drivetrain vibration and maintain proper transmission alignment under demanding driving conditions. Chassis Engineering offers a wide range of universal and vehicle-specific crossmembers compatible with popular GM, Ford, and Chrysler transmissions, making them ideal for restoration projects, performance upgrades, and custom fabrication work. Engineered for easy mounting and long-lasting reliability, Chassis Engineering transmission crossmembers provide the strength, fitment, and professional-quality support needed for dependable street and performance builds.
