Overview
The Dana Spicer Ultimate Dana 60 rear axle assembly, part 10005942, is a direct bolt-in rear axle for the 2007–2017 Jeep Wrangler JK.
The product title gives a 5.38 ratio, but the bullet list names a 9-3/4 inch axle with a 4.88 ring and pinion. The two figures conflict, so confirm the ratio with the seller before ordering if the gear ratio matters for your tire size.
The rear axle uses 4340 chromoly 35-spline axle shafts, a heavy duty full floating wheel bearing design and a 14-inch dual piston disc brake setup with plug and play ABS. It also has a nodular iron differential cover and a 1350 pinion yoke.
Key features
- Rear axle with full floating wheel bearing design
- Electric selectable locker
- 4340 chromoly 35-spline axle shafts
- Nodular iron differential cover
- 14-inch dual piston disc brakes with plug and play ABS
- 8 on 6.5-inch wheel bolt pattern
Ratio and tire size
Axle ratio sets how much the engine turns for each turn of the wheels, which affects acceleration, highway noise and fuel use. Bigger tires lower the effective ratio, so a fixed ratio can feel weak on larger wheels. Before buying an axle assembly, measure the tire diameter and compare it with the gearing the Jeep already uses. A ratio that does not match the tire size can make the transmission hunt between gears.
A full floating axle with a locker suits trail use, since the locker keeps both wheels driving when one loses grip. Engage the electric locker at low speed, and never use it on pavement at speed. After a regear or axle swap, check the brake lines, ABS wiring and disc surfaces, and inspect the axle seals and differential fluid at routine service. Heavy use on rough ground can loosen fasteners, so recheck them after the first few trail outings.
- Match the ratio to your tire diameter
- Inspect ABS wiring after an axle swap
- Check differential fluid at routine service
Specifications
| Brand | Dana Spicer |
|---|---|
| Part number | 10005942 |
| UPC | 23913340179 |
| Axle position | Rear |
| Ring and pinion | 9-3/4 inch, 4.88 ratio per the bullet list (title gives 5.38) |
| Housing | Dana 60, 3-1/2 inch tube with .390 wall |
| Axle shafts | 4340 chromoly, 35 spline |
| Locker | Electric selectable |
| Brakes | 14-inch dual piston disc |
| Wheel bolt pattern | 8 on 6.5 inch |
Vehicle fitment
It is a direct bolt-in replacement for the 2007–2017 Jeep Wrangler JK. Check fit before ordering for any other Wrangler generation.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Aftermarket wheels are needed for the 8 on 6.5-inch pattern, and drive shaft modifications are needed too. Confirm the gear ratio against your tire size and gearing before fitting.
What’s included
Complete rear axle assembly.
