Detroit TrueTrac 9.25 in. Differential 2010-2018 Ram 15002010 2018 Ram 1500 1 2 Ton Truck V6, V8 31 Splines 9. 250 in. Ring Gear Diameter For All Gear Ratios 6 Pinion Gears Limited Slip For Rear Axle Chrysler 9. 25" Features: Employs helical gears Functions as an open differential until terrain changes or traction loss is detected Sealed unit eliminates maintenance concerns Reduce wheel spin for improved traction on and off road Engages automatically resulting in a smoother ride No action required from the