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Quantity
1
Description
Lift heavy trailers-Without the strain. The SuperMax Gearbox is a heavy-duty, American-made jack upgrade that replaces manual cranking with your cordless drill. Built with our highest gear reduction, it delivers serious torque so you can lif...
Reviews
4.6
18 ratings
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Excellent product ! Very smooth gearing, picks up my gooseneck dump trailer with ease. Would recommend the Supermax Gearbox over any other product !
C
Customer · 8 days ago
I can hook up by big 3 horse gooseneck by myself now
I have a big 3 horse goose neck with a large weekender that even my very fit husband struggled to crank. I'm 5'3" 130lb female. No way I could do it. I thought that before spending over $1.5k for a hydraulic lift I would give this a shot. It makes my DeWalt 20v work pretty hard but I can handle it. I bought the handle for the Gearbox and removed the shaft with the handle from the trailer. The Gearbox handle rests on the tailgate when I'm lifting the trailer, making my job even easier. I've only used it twice so far, but am pretty impressed with this thing. I'd rather spend the money to fix the AC and update the trailer than a fancy lift. Very happy with my purchase and I can hook up my own trailer now if necessary.
J
Julie · June 30, 2026
Very disappointed. Doesn’t go on far enough to quite get the pin through hole to turn shaft. Can put a nail in it but it won’t stay and bends it. Just not made long enough to work. Bottoms out against Jack body