10-Minute Tech: No-Slip Jack

Ten Minute Tech - Jack illustration
Illustration by William Tipton


I have heard horror stories of people jacking up their trailer to fix a flat or other repair, and the jack slips from under the axle. I have come up with a simple and inexpensive remedy to this problem. I use a bottleneck jack that goes under the axle as close to the back side of the brake assembly as possible. I measured the width and height of the axle. I took a 1/2-inch piece of metal, cut and bent it into a U to fit the axle. Next I took a piece of tubing that fits over the piston of the jack, cut it 1 inch wide and welded that to the piece of U plate that I made. I placed the whole unit on the top of the jack. Now I can raise my RV with no worrying that the jack might slip and cause damage or, even worse, injury.
Total cost: less than $25.

Doug Duval | Lunenburg, Massachusetts



  1. Mr. Doug Duval’s no slip jack has a big drawback in that on multi-axle trailers, the axles (individually) are not rated to handle the entire weight of the trailer. If only one axle is lifted, then it is exceeding its weight capacity and will probably be bent. Multi axle trailers should be jacked up on the frame. Single axle trailers are OK to lift by the axle because the axle is rated to handle the entire trailer weight. Most RV trailers are multi-axle. I feel he will be replacing a lot of prematurely failed tires.

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