One problem related to mechanical jack has been reported for the 2005 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Jeep Grand Cherokee based on all problems reported for the 2005 Grand Cherokee.
My 2005 Jeep Grand Cherokee needed a flat changed. The jack in the car was not able to jack the car high enough to get the flat wheel dismounted easily nor could the new wheel be mounted from the trunk. The dealer sent a shop mechanic who also could not get the jack high enough. I had to call aaa. I also know of 3 more Jeeps (2-2005 and 1-2006) with the same potential problem. Oddly, one of them, which is owned by a lady friend, had the oddest problem. My brother-in-law was driving it one day. Turns out there was a wheel shimmy going on. He stopped the vehicle on the side of the highway. When he called me he indicated 3 lug bolts were missing which we both thought strange. He subsequently coaxed the car very slowly home. The dealer charged the lady for the repair and remounting of a new tire. I suspect that she had a flat, got some help and because the new wheel was not mounted in a true fashion because the car could not be raised high enough, she just had to make do. That was dangerous for the lady. As it turns out, my wife also has one of the Jeeps I mentioned, and I have instructed her to just call aaa when and if she gets a flat, so the tire can be dismounted and remounted with the new one safely. All our cars have 17" wheels. The jack needs to go up at least 2-3 inches more to all for proper mounting or else the wobble will result and hence , ultimately the bolts will break off given the stress. I mentioned it to my dealer once I had aaa repair my car and asked the dealer to repair and get the problem fixed with the manufacturer. I also think the lady I mentioned who paid for her repairs because of Jeep's equipment design defect should be reimbursed for her misery.