Detroit Truetrac Differential Ford 8.8" 31 SplineThe Truetrac is the leading helical gear type limited slip differential in the industry. Eaton has a proven track record of producing the most effective and dependable traction differentials in the world. Truetrac's patented design of parallel axis, planetary helical gears, provides a smooth and quiet, automatic division of torque. Power transfer is so smooth, it literally goes unnoticed by the driver even in front wheel drive axles. Because of