Dynatrac - Confidence to Explore, For over 25 years, Dynatrac™ has been the industry leader in high-performance off-road axle and drivetrain assemblies. Dynatrac products are designed using the finest materials, processes and engineering available, and its products are backed by the best service and warranty in the business. From complete ProRock™ axle assemblies to replace Dana 44 and Dana 60 axles, to rebuildable heavy-duty ball joints and Free-Spin hub conversion kits and ProGrip™ brake systems, Dynatrac is committed to deliv.