Chassis Components Crossmembers

GForce

Transmission Crossmember

$500.00

SKU: RCB3-350

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The G Force RCB3-350 is a transmission crossmember designed for 1977-1990 GM B-Body models, including Caprice, Impala, LeSabre, Oldsmobile 88, Bonneville, Parisienne, and Catalina. It is compatible with various transmissions such as TH350, TH200, TH250, Muncie, T10, Super T10, Powerglide, and Saginaw. This crossmember features a black powder-coated finish and includes all necessary mounting hardware.
Show original supplier description
The G Force RCB3-350 transmission crossmember provides a robust solution for 1977-1990 GM B-Body vehicles, offering compatibility with a wide range of transmissions including the TH350, TH200, TH250, Muncie, T10, Super T10, Powerglide, and Saginaw. This crossmember is engineered to fit popular GM B-Body models such as the Caprice, Impala, LeSabre, Oldsmobile 88, Bonneville, Parisienne, and Catalina. Constructed with durability in mind, this crossmember sports a black powder-coated finish for corrosion resistance and a clean aesthetic. Mounting hardware is included, simplifying the installation process. G Force emphasizes its commitment to engineering bold solutions that enhance installation ease without compromising quality, backed by downloadable instructions for a smoother setup. The product specifications indicate a weight of 36 lbs and shipping dimensions of 53x11x6 inches. Additional notes from "ShopTalk" suggest that for vehicles originally equipped with 3/8" crossmember bolts, the frame holes may need to be opened to 1/2". Alternatively, using Grade 8 bolts and hardened flat washers can retain 3/8" fasteners. Minor contact between the floorpan and crossmember due to settling or a bowed floor pan is sometimes noted, typically correctable with a floor jack and wood cushion.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGForce
Part NumberRCB3-350
CategoryChassis Components

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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