Items You Need
G-Body Crossmembers
JEGS 555-640603 Transmission Crossmember Features:
- The double-hump design allows dual exhaust upgrades for your vehicle
- Black powder-coated steel for strength, great looks, and long life
- Must have upgrade for transmission swaps
JEGS 555-640603 Transmission Crossmember Installation Notes:
- If installing on a 1978-1983 G-Body you will need part number 555-64718 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 Chevy small block 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.
Specifications:
Will this work with a 78 Monte with 6.0 LS and 4L80e?
Will it fit a 1982 cutlass with a 6.0 400 transmission?
What is fit a 1983 El Camino with a 4-H small block and 400 transmission thr
I have a 1983 Chevy Malibu station wagon. Going to put 350 in it with a 400 tranny. Will this work?
Will this fit 1985 buick regal with tci powerglide
How close will this be on my 62 Oldsmobile with a TH400 transmission?
Will this fit a 1984 Oldsmobile Cutlass Hurts old with olds 307 and TH200 4r trans?
Will this fit a 200-4R tranny in a 1988 monte carlo ss? I see mixed answers on here some say it fits and some say no...thank you
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
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Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.