One problem related to differential unit has been reported for the 2008 Jeep Wrangler. The most recently reported issues are listed below.
Front axle (differential) oil seals are leaking lube oil quickly. There are leak reported issues with these dana 30; dana 35; and my own rubicon's dana 44 axle. The axle seals are leaking lube oil from the axle ends. Again, this is happening to my '08 Jeep Wrangler rubicon and also to many other Jeep Wrangler models from 07-17 years as well as reported and confirmed by other owners of Jeep jk and jku models 2017, 16, 15, 14, 13, 12, 11, 10, 09, 08, 07 models. There should be a goverment recall since many of these Jeeps are experiencing the same axle leak issues as reported. Unfortunatedly, fca does not cover this simple power train fix since my vehicle it's out of warranty.