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Tools› Engine-Related

GForce

GM 10L90 Transmission Mock-Up Block

$259.00 $234.99 Save $24.01

SKU: GF-MUT-10L90

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

Beginner — under 30 min

Overview

The GForce GF-MUT-10L90 is a transmission mock-up block designed for the GM 10L90 transmission. This patent-pending tab-and-slot design provides accurate mounting and yoke positions. It is lightweight, comes disassembled, and is made from durable steel construction that resists welding heat.
Show original supplier description
The GForce GF-MUT-10L90 is a patent-pending transmission mock-up block engineered for the GM 10L90 transmission, commonly found in GM cars and trucks from 2017 to present. Its unique tab-and-slot design ensures accurate placement of the transmission mounting points and driveshaft yoke, simplifying custom crossmember fabrication and other fitment tasks. The lightweight, disassembled design facilitates easy shipping and storage. It allows for precise positioning of the 10L90 transmission by hand, eliminating the need to physically maneuver the heavy transmission during mock-up. This tool is intended to save time, money, and improve safety during vehicle modifications and custom builds. Mounting hardware is not included. The product has a metal finish and weighs 18 lbs.

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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Available on iOS & Android

Specifications

BrandGForce
Part NumberGF-MUT-10L90
CategoryTools

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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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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