JEGS 555-640603 Transmission Crossmember Features:

• This crossmember was designed as a replacement for the factory crossmember, allowing for dual exhaust
• Compatible with the following applications: 1978-1988 GM G-body vehicles, including Chevrolet Malibu, Monte Carlo, Buick Regal and Grand National, Oldsmobile Cutlass, and Pontiac Grand Prix. Will not fit Olds Cutlass Supreme or Chevy El Camino models
• The double-hump design allows for a dual exhaust upgrade
• Manufactured using 1 1/2 in x 2 1/2 rectangular steel tubing with .120 wall thickness
• Black powder-coated steel for strength, great looks, and long life
• A must-have upgrade for transmission swaps

JEGS 555-640603 Transmission Crossmember Installation Notes:

• If you are installing this crossmember on a 1978-1983 G-Body, you will need a frame extension. (SEE ITEMS YOU NEED FOR THE FRAME EXTENSION) This piece is designed to replicate the longer driver side frame rail of the 1984 and later GM G-Body cars, giving you the proper mounting locations for this crossmember.
• Some 1983 Hurst Oldsmobiles were originally equipped with a 2004R transmission and will not require this frame extension. If you are unsure, 1984 and later models will feature two mounting locations for the transmission cross member approximately 14 in. behind the front set of mounting holes.
• Crossmember is designed for 1978-1988 G-Bodys that were originally equipped with a small block Chevy engine.
• Does not fit Cutlass Supreme models or El Camino.
• Engine and transmission swaps may require some additional modifications & fitment of components. Hardware is not included.

FAQ

Is a transmission crossmember important?

• Yes, a transmission crossmember is crucial for maintaining proper alignment and support for your transmission in your car ot truck.

What size bolts attach a TH400 to a crossmember?

• Use appropriate size bolts as specified in the TSM (technical service manual) for the transmission being used. Depending on the year and application they could be either Metric or SAE thread.

What is a TH400 transmission compatible with?

• The TH400 was introduced in 1964 and produced through 1990 and is compatible with various GM (General Motors) applications, including Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac Model Cars and Trucks. It was also used in Jeep applications, including Jeepster Commando, Jeep Wagons and Pickups from 1969-1979, and Jeep CJ7 Models from 1976-1979.