tell a problem first so helper is on same page. you meant I bet, the CENTER DIFF.? NO. if mean front ,or rear axles say so.. there are 3 differentials , the center is very complex. WK2 jeep, it is 2013 n May 2013 there was a recall of WKs with the Quadra-Drive II and Quadra-Trac II systems. This followed cases of cars rolling away due to the transfer case moving into neutral of its own accord, and the owner not having applied the parking brake. The recall revised the Final Drive Control Module (FDCM) software. However, following the recall, there were widespread reports on enthusiast websites but most users never have occasion to use the low ratio and may never discover the fault. Four years after this recall its issues remain unresolved. . The company is aware of 41 injuries that are potentially related. It was also the cause of actor
Anton Yelchin's Deathh. (a very sad story that) read the wiki on this first
https://en.wikipedia.org/wiki/Jeep_Grand_Cherokee#Transfer_case_actuator always set the hand brake first, , in my jeep I set 1st gear, it is M/T"stick shift. and with 4wd if a kid moves the transfer case to Neutral the car will roll. unless hand brakes are set hard. be safe. this jeep offers jeep Grand Cherokee offers three 4×4 systems - Quadra-Trac I®, Quadra-Trac II® and Quadra-Drive® II with Electronic Limited-Slip Differential (ELSD) ELSD is here Quadra-Drive II Quadra-Drive II uses the
New Venture Gear NV245 transfer case mated to front and rear axles containing
electronic limited slip differentials or ELSDs. Jeep added
traction control in 2005 and starting in 2011 only a rear ELSD is offered, while the front has an open differential. Applications: 2005-Present
Jeep Grand Cherokee (WK, WK2) ELSD is in the axles and PCM controls all that M-ELSD is here
SOLVED ,where is it at: IS HEREELSD module is located under the rear drivers seat. If you remove the bolts for the seat legs you can lift the rear cushion up and flip the carpet forward. It will be right there with three plugs.