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G Force Performance

Crossmember, 2004R/TH400 Transmission, 1978-88 G-Body

Vehicle Specific fits 7 models
3 Reviews
Part# L240378
You Save $25.96
Arriving Soon
Estimated the week of 4/13/2020

’78-88 El Camino, Malibu and Monte Carlo

Our transmission crossmembers are precisely manufactured in the USA using only top-quality materials. Available for a variety of transmission applications, these heavy-duty crossmembers utilize 2” x 2” mild steel tubing, 1/2” plate for dual exhaust humps, 3/16” plate for end mounts as well as Grade 8 hardware. Each crossmember is painted a gray Hammertone color and also features detailed instructions for a painless installation.


  • NOTE: L240378, L240380 and L240381 require the use of frame extensions (part# L240383 sold separately) for proper mounting on 1978-83 cars.
  • SHIP NOTE: This item exceeds standard size and is exempt from free shipping.
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

Vehicle Fitment

Make & Model Year Range Application Details
Buick Grand National 82 TH400, 200-4R
Buick Grand National 84-87 TH400, 200-4R
Buick Regal 78-87 TH400, 200-4R
Buick T-Type 83-87 TH400, 200-4R
Chevrolet El Camino 78-87
Chevrolet Malibu 78-83
Chevrolet Monte Carlo 78-88
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Reviews (3)

Crossmember, 2004R/TH400 Transmission, 1978-88 G-Body
G Force Performance Crossmember, 2004R/TH400 Transmission, 1978-88 G-Body