Got an older Ford with a weak open differential that spins one tire? This Powertrax No-Slip unit is a popular upgrade. It's designed specifically for Ford 8-inch differentials with 28-spline axle shafts (axle diameter is 1.2 inches). It replaces your stock open carrier but keeps the same ring and bolt pattern (10 bolts). The clever part? It automatically locks both wheels together when it senses slip, giving you much better traction in mud, snow, or off-road, but it still allows for normal differential action when turning on pavement – so no annoying 'chatter' like a full locker. It fits a long list of classic Fords and Mercurys from the 60s to 80s (Mustangs, Falcons, Torinos, etc. – check the full list!). Comes with a solid 2-year/100,000-mile warranty. Professional installation is highly recommended for this kind of work. A great way to add serious off-road capability without a full axle swap.
