Review on Optimized for Better SEO: Detroit Locker 912A585 🔍 Trutrac Differential with 27 Spline - Fits Dana 30 by Chris Spoja

I ordered my 2011 Jeep Wrangler Sport S with open diffs because I didn't need the $300 optional rear Trac-Lok. Detroit Truetracs have a reputation for being bulletproof, fully automatic, limited-slip differentials. They are quiet and lock quickly, but act like open differentials when traction is good. These helical gear differentials are smooth-running and maintenance-free. If you're on ice or a wheel comes off the ground and spins, you can get the differential to lock by applying the brake, otherwise they'll lock themselves when needed. These LSDs may not be true lockers, but they work automatically without cable, electricity or air. 912A585 is the correct P/N for Dana 30 JK with 3.73 and higher gears. 913A589 Detroit Truetracs are the ones you need for Dana 44 JK rear axles. However, note that Eaton may not extend the warranty on tires larger than 33 inches. They must be installed by a specialty shop that knows how to set them up properly.