Yukon Gear Replacement Standard Open Loaded Carrier For Liberty Dana 30 / 3.73+

A front differential that pops, grinds in 4WD or locked up after a spider gear let go is a common end for the Dana 30 under a Jeep Liberty, Dodge Nitro or non-Rubicon JK Wrangler. Yukon YC D708115 is a new standard open carrier for that front Dana 30, sold loaded: it arrives with the spider gears installed, and Yukon's technical notes say it also includes carrier bearings, races and ring gear bolts. It is built for 3.73 and numerically higher gear ratios.

What the carrier does in a front Dana 30

The carrier is the case the ring gear bolts to. Inside it, two side gears and the spider gears on a cross shaft let the left and right front axles turn at different speeds in a turn while still splitting torque. On the Liberty KJ the Dana 30 is an independent front axle, with CV shafts plugging into the side gears; on the JK it is a solid axle. Either way, an open carrier sends power to the tire with the least grip, so wheelspin on ice or a rock ledge is where spider gears overheat, gall and break. Dana 30 carriers come in two series split by gear ratio, because deeper ratios use a ring gear that sits differently on the case. This one is the 3.73-and-up version.

Symptoms of a failed front carrier

• Clunk or bang from the front axle when engaging 4WD or turning in 4WD.
• Grinding or ratcheting from the front center section, sometimes with the front driveshaft turning but no pull from the front tires.
• Metal chunks, not just fine paste, on the drain plug or cover after a hard wheelspin event.
• A CV shaft or axle shaft that pulls out of the side gear with stripped or galled splines.
• Whine from the front when in 4WD that disappears in 2WD; that can also be bearings, so confirm below.

How to confirm before ordering

Drain the front axle and pull the cover. Rock each side gear by hand and look at the spider gears and cross shaft for chipped teeth, bluing or a shaft that has walked out of its bore. If only the spider gears are damaged and the case is clean, a Yukon KJ Dana 30 spider gear kit may be enough. If the case is cracked, the cross shaft bore is egged out or you are regearing anyway, replace the whole carrier. Read the ratio on the axle tag or count ring and pinion teeth; our gear ratio and axle code guide shows how, and the Dana 30 front axle problems guide covers the other wear points.

Fitment

Yukon lists this carrier for the front Dana 30 in the 2002-2007 Jeep Liberty KJ 4WD (the Super 30), 2008-2012 Liberty, 2007-2011 Dodge Nitro, and JK Wrangler X, Sahara, Sport, Sport S and Unlimited versions from 2007 through 2017 (submodel years vary). It is only for 3.73 and up ratios; a Jeep with a lower numeric ratio needs the other series carrier. JK Rubicons use a Dana 44 front and are not covered. The listing title names the Liberty, but the same part covers the Nitro and JK. Send us year and VIN if you are unsure what is under your Jeep.

Install notes

• Bolt the ring gear on with new bolts and thread locker, tightened evenly in a star pattern to the service manual figure.
• Press on the carrier bearings and set backlash and preload with shims, then check the gear pattern with marking compound. The Yukon JK Dana 30 master overhaul kit supplies pinion bearings, seals and shims if the pinion side is worn too.
• Regearing a JK at the same time? The Yukon JK Dana 30 4.56 gear set fits this 3.73-and-up carrier series.
• On a Liberty, inspect the inner CV joints while they are out; the 2002-2007 Liberty front CV axle pair replaces torn or clicking shafts.
• Refill with 75W-90 gear oil.

Does it fit a 2005 Jeep Liberty?

Yes, if it is 4WD and the front axle ratio is 3.73 or higher. Yukon lists 2002-2007 Liberty KJ 4WD with the front Dana Super 30.

What does loaded mean here?

The spider gears are installed. Yukon's technical notes say the carrier bearings, races and ring gear bolts are also included. You transfer or replace the ring gear.

Will it fit a JK Rubicon?

No. Rubicons use a Dana 44 front. This is for the front Dana 30 in non-Rubicon JKs, Liberty and Nitro.

My axle has 3.55 gears. Will this work?

No. It only accepts 3.73 and numerically higher ratios. Lower ratios need the other series Dana 30 carrier, or you can regear to 3.73 or deeper.

Do I need to set up the gears again?

Yes. A new carrier changes backlash and bearing preload, so the ring gear must be set up with shims and a pattern check.

What fluid goes in the front axle?

75W-90 gear oil.