Product Summary

2004R, TH400, Steel, Powder Coat

  • Specially designed for the 1984-1988 G-Body
  • Crossmember is engineered to fit the GM-3 Transmission Group
  • It bolts to the rear set of frame holes on drivers side frame rail
  • Made from durable steel with a powder coated finish for added corrosion protection and enhanced looks

Key Specs

MFG. Part #RCG-400
BrandG Force Crossmembers
Material TypeSteel

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G Force Crossmembers RCG-400 Details

This generation of vehicle is prone to body bushing compression, even with some southern vehicles. If the floor pan is too close to allow installation, it may be necessary to replace the body bushings. Some customers have reported that with slight interference instances, they have been able to gently lift the floor pan with the assist of a floor jack and a wood cushion, thus providing the required clearance for installation. On all 78-88 G body crossmembers, the passenger side hump is the taller of the two, and on some installations, it is necessary to remove the catalytic converter heat shield from the passenger side floor pan.

  • Fits 1984-1988 G-Body
  • Bolts to the rear set of frame holes on drivers side frame rail


Since different transmissions can share the same overall lengths as well as other measurements, they can also share some transmission crossmembers. G-Force has grouped the transmissions together that can share the same crossmember.

This Crossmember fits the GM-3 Transmission Group:

  • Turbo Hydra-Matic 2004R (TH2004R)
  • Turbo Hydra-Matic 400 (TH400)
  • Turbo Hydra-Matic 375 (TH375)


G Force Crossmembers RCG-400 Specifications

MFG. Part #RCG-400
BrandG Force Crossmembers
Material TypeSteel
FinishPowder Coat
Sold in QuantityEach
NotesPlease note that G-Force crossmembers do not include the G-Force logo sticker as shown in the picture. This decal is shown for brand reference only.