One problem related to differential unit has been reported for the 2002 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Jeep Grand Cherokee based on all problems reported for the 2002 Grand Cherokee.
2002 Jeep Grand Cherokee started making horrible "wobble" noises from rear of vehicle at approximately 30,000 miles. Paid $660 to replace completely worn (all) bearings. Repair shop (progrear, san diego, CA) said this was a very common repair in zj Grand Cherokees.