Put stronger, quieter gearing under your Jeep with the Spicer Differential Ring and Pinion (P/N 10026639), a DANA 30 front set cut to a 4.88 ratio. It's a direct-fit gearset for the 2007-2022 Jeep Wrangler and the 2018 Jeep Wrangler JK — see the Buyer's Guide tab for the full engine-level fitment. Built for owners who push their vehicle to the extreme, Spicer gearing pairs Dana design, engineering, testing, and manufacturing to deliver proven durability.
The ring gear and pinion are matched components that set the final drive ratio in the front differential. Worn, chipped, or howling gears — or a change to a 4.88 ratio for larger tires — are common reasons to install a fresh set. If worn factory gearing is the cause of your driveline whine, this Spicer set replaces it. Proper setup of backlash and pinion preload during installation is essential.
What axle and ratio is this gearset?
It's a Spicer front DANA 30 ring and pinion set with a 4.88 gear ratio (P/N 10026639).
Which vehicles does it fit?
It's a direct-fit for the 2007-2022 Jeep Wrangler and the 2018 Jeep Wrangler JK. Check the Buyer's Guide tab to confirm your exact vehicle.
Is this the front or rear gearset?
This is a front differential ring and pinion for the DANA 30 axle.
What are signs I may need a new ring and pinion?
Gear whine or howl, chipped or worn teeth, or a desired ratio change for larger tires are common reasons to replace the gearset. Diagnose the cause first.
Does installation require special setup?
Yes. Ring and pinion installation requires proper backlash and pinion preload setup, so professional installation is recommended.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
