One problem related to differential unit has been reported for the 2004 Jeep Wrangler. The most recently reported issues are listed below.
2004 Jeep Wrangler. Consumer writes in regards to several issues found during inspection after purchase of vehicle the consumer stated the day she test drove the vehicle, she noticed some play in the steering, the engine seemed to miss a little, and the cd player in the radio seemed to work whenever it wanted to. The next day, the consumer noticed the front differential leaked an oil spot on the concrete driveway. The consumer took the vehicle to a pre-sales establishment and the inspection revealed, the rear axles were leaking on both sides, the pinion seal in the front differential needed to be replaced, the front track bar had play, the transmission needed a new pilot bearing; as there was a noise when accelerating and the rear sway bar links were loose.