As Jeep Wrangler JK owners are pushing the limits with bigger tires and harder trails, a bigger axle becomes a necessity. Dana recognizes this and designed fully bolt-on axles front and rear loaded with either Eaton E-Lockers or ARB Air lockers. Each Axle is ready to bolt in, including an assembled ring-and-pinion, axle shafts, brakes and wiring. Ultimate 60 Front Axle Features: Choice of Eaton E Locker Or ARB Air Locker Choice Of 4.88 or 5.38 Gears Massive Spicer SPL-70 Axle Shaft U Joints Spicer 35 Spline 4340 Chromoly Steel Axle Shafts Warn 35 Spline Hub Locks Dead Spindle Design High Strength, Heavy Gauge Bracketry High Clearance Carrier with Ribbed Housing Design Heavy Duty 8 x 6.5 Wheel Bolt Pattern Nodular Iron Differential Cover With Protective Ribbing Upper And Lower Control Arms In OE Locations Genuine USA Made Spicer 10" Ring and Pinion Spicer 1350 Strap Style / Half Round End Yoke 3.5" Diameter / .370" Wall Thickness Axle Tubes Upgraded Heavy Duty Brakes with Plug-And-Play ABS System Ultimate 60 Rear Axle Features: Choice Of Eaton E-Locker Or ARB Air Locker Choice Of 4.88 or 5.13 Gears 35 Spline 4340 Chromoly Steel Axle Shafts Upgraded Heavy Duty Brakes With Plug-And-Play ABS System Massive Vented Rotors (358mm) and Dual Piston Calipers For Optimal Braking Power Genuine USA Made Spicer 9.75" Ring And Pinion Spicer 1350 Strap-Style / Half Round End Yoke 3.5" Diameter / .390" Thick Axle Tubes Heavy Duty 8 x 6.5 Wheel Bolt Pattern Heavy Duty Bracketry Nodular Iron Differential Cover FRONT OPTIONS: 4.88 - Eaton E Locker with Brakes - 10005778 4.88 - ARB Air Locker With Brakes - 10033062 5.38 - Eaton E Locker WIth Brakes - 10005777 5.38 - ARB Air Locker With Brakes - 10033061 REAR OPTIONS: 4.88 - Eaton E Locker With Brakes - 2023612-1 4.88 - ARB Air Locker With Brakes - 10032016 5.38 - Eaton E Locker With Brakes - 10005942 5.38 - ARB Air Locker With Brakes - 10032017