913A589 - Eaton Detroit Truetrac Differential, Type: Limited Slip, Ring Gear Dia. 8.5", 30-Spline, Axle Shaft Dia. 1.31" General specifications Product Name Eaton Detroit Truetrac Differential Catalog Number 913A589 Axle information Axle description Dana 44 Various Dana 44 Dana 44 Dana 44 Wrangler Dana 44 Dana 44 Axle location Rear Rear Rear Rear Rear Rear Axle shaft diameter 1.31 IN Additional specifications Differential type Limited Slip (LSD) Gear spline tooth count 30 EA Ring gear size 8.5 IN Ring gear ratio 3.73 & dn Vehicle usage Off-Road: Rock Crawl Off-Road: Light Trail / Sand Sports On Road: Restoration Off-Road: Work Truck / Towing On Road: Work Truck / Towing On Road: Circle Track On Road: Street and Muscle Off-Road: Extreme Off-Road On Road: Drag Racing