Chassis Components› Crossmembers

G FORCE CROSSMEMBERS

77-90 B-Body Crossmember TH400

$409.24

SKU: G034 RCB3-400

In Stock
In Stock
Ships by Jun 8
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The G Force RCB3-400 is a direct bolt-in transmission crossmember designed for 1977-1990 B-Body GM vehicles. It accommodates TH2004R, TH400, and TH375 transmissions, utilizing factory mounting locations without the need for drilling, cutting, grinding, or welding. Made from powder-coated steel, it includes new mounting hardware and features large exhaust clearance humps.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandG FORCE CROSSMEMBERS
Part NumberG034 RCB3-400

Videos

THE G FORCE TH400 CROSSMEMBER FINALLY CAME AND THE DOLO BOX CHEVY IS BACK!

THE G FORCE TH400 CROSSMEMBER FINALLY CAME AND THE DOLO BOX CHEVY IS BACK!

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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