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The Best Gearbox Ever?

Posted in How To: Transmission Drivetrain on September 1, 1998
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If you've driven or even ridden in over-the-road trucks (18-wheelers), then you probably won't be surprised that Don Scoggins has finally created the Brabnod Mountain Gear. You may even be kicking yourself for not doing it yourself. Scoggins adapted big-truck auxiliary-transmission technology to give your fullsize or downsize 4x4 a four-speed intermediate gearbox that more than triples your transfer case low range and tacks on a 21 percent overdrive.

The Brabnod Mountain Gear mounts between your tranny (on most popular 4x4 autos or manuals) and your transfer case. So its 3.258:1 deep Underdrive, 2.575:1 Second Under, 1:1 Direct, and .79:1 Overdrive work in both two- and four-wheel drive, and both low and high range. Not only that, but the Mountain Gear is a complete auxiliary tranny, so you can split each of the regular tranny gears too. Whether you're four-wheeling, towing, or just climbing a steep grade, you can select that perfect half-gear to keep your engine in its powerband.

The Brabnod Mountain Gear box has no shift lever. Scoggins adapted a push-button air-shift system from big rigs too. The price may sound steep at about $3,500, but that's comparable to many double-transfer-case setups and offers much more. Let's take a closer look at this gearhead's dreambox and its installation in an '87 Ford Ranger.

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