Drivetrain› Automatic Transmissions and Components

GForce

Transmission Crossmember for 6L80E/6L90E

$500.00

SKU: RCB3-6L80

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 RCB3-6L80 is a crossmember designed for GM B-Body models from 1977-1990. It is compatible with 6L80E and 6L90E slip yoke transmissions. The crossmember features a black powder-coated finish and includes mounting hardware.

A transmission mount, the GF-GMATM, is included for proper fitment with the specified transmissions.
Show original supplier description
The G Force RCB3-6L80 crossmember is specifically engineered for 1977-1990 GM B-Body vehicles, including models such as Caprice, Impala, LeSabre, Oldsmobile 88, Bonneville, Parisienne, and Catalina. This crossmember is designed to accommodate 6L80E and 6L90E slip yoke transmissions. For optimal fit with these transmissions, the GF-GMATM Transmission Mount is included as part of the package. The product boasts a durable black powder-coated finish and comes with all necessary mounting hardware for a straightforward installation. G Force emphasizes easy installation and quality in their products. The company and its partners aim to provide solutions that simplify the installation process without compromising on quality. This crossmember is built with strength and durability in mind, reflecting the engineers' passion as car enthusiasts. Specifications for the RCB3-6L80 include a weight of 37 lbs, shipping dimensions of 51 x 19 x 6 inches, a black powder-coated finish, and included mounting hardware. Installation details mention that to use the provided 7/16″ hardware, frame rail holes may need to be enlarged to 1/2″ with a drill. Alternatively, using stock 3/8″ hardware is possible but Grade #8 fasteners are recommended for compensation.

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 NumberRCB3-6L80
CategoryDrivetrain

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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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