For Sale | US Gear Dual Range overdrive unit with GM turbo 400 adapter

Posted By

Kevin Allard

March 5, 2026

Posted in

Parts, Technical

I’ve got a rare US Gear Dual Range overdrive unit for sale. It includes a GM Turbo 400 adapter.

This unit is designed to replace a transfer case and provide an overdrive gear for non-overdrive transmissions, such as the Turbo-Hydramatic 400 or 350. It is technically considered an auxiliary transmission and offers a 1:1 direct drive and a 0.80:1 overdrive gear, shifted using an electronic shift motor.

Check it out on our eBay listing!

Kevin Allard

Kevin is a proud American outdoorsman with deep roots in Arizona’s rugged wilderness. Raised in the heart of rural Arizona, he spent his youth exploring the untamed backcountry alongside his father, igniting a lifelong passion for adventure and history. Today, Kevin continues that legacy with his son, journeying into Arizona’s most remote corners in search of forgotten trails and the stories of early western pioneers.

A staunch advocate for motorized access to public lands, Kevin combines his love for the outdoors with a dedication to stopping government overreach. His work has been featured in respected outlets like The Western Journal and 4Low Magazine, and he shares his adventures and advocacy through his platform, AZBackroads.com.

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