Chassis Components› Crossmembers

G FORCE CROSSMEMBERS

TH400 Transmission Mockup

$236.94

SKU: G034 GF-MUT-TH400

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The G Force Crossmembers TH400 Swap Block is a transmission mock-up block featuring a patent-pending tab-and-slot design. This tool ensures accurate transmission mounting and yoke positioning for TH400 transmissions in GM cars and trucks from 1964-1990. Its durable steel construction allows for fabrication work, such as custom crossmembers, to be done safely and efficiently near the block.

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 GF-MUT-TH400

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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