Question about 1996 Jeep Grand Cherokee

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1996 jeep grand cherokee ltd problem with transfer case because of different size tires

I put two 245-75-R16 tires on the front and still had two 245-70-R16 tires on the back.
When my wife drove about 15 miles the transmission was shaking and hot. After letting the car sit for 43 hours I drove it back home at under 30 mph and it seems fine.
Question : What problems have we created in the transfer case? And is the jeep safe to drive if I put another two 245-75-R16 tires on the back, so all tires are the same size?

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  • vhuckfeldt Nov 07, 2008

    The information in the answer I had already been told. The question is how do I tell if any damage has been done to the transfer case? Now that I have 245-75-R16 tires on all four wheels no futher damage will occur, but how do I tell if any real damage was done during the time that different size tires were on the jeep and it was in full time 4wd with the 1996 quadratrack?

  • MSPeck Feb 16, 2009

    Does the differential, overtime in the 1996 jeep Cherokee all wheel drive, become a problem. I am looking at one that has 162,000 miles on it.



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You should have the same size tires in the front and back. By having 2 different sizes, you are changing the gear ratios between the front diff. and rear diff. You could wipe out the t-case especially if it is full time 4wd.

Posted on Nov 06, 2008

  • Michael Zangari
    Michael Zangari Nov 07, 2008

    There really is no way to tell if there is any damage unless you open up the t-case.

    It's a good thing you din't drive very far and caught the noise right
    away. There is a part in the t-case called the viscouse coupler, this
    would be the part to fail if you did put a considerableamount of miles
    on it. If the Jeep does'nt make any noise while driving or making sharp
    turns then your ok.

    For your information the viscouse coupler cost about 600.00 dollars.



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1993 jeep grand cherokee laredo 4 wheel drive

I'm not absolutely sure on the tire size for the jeep itself, but I think they are 225/65/R15's. Not absolutely sure.

As for the noise, from your explanation, it sounds like the transfer case is under a heavy bind. Take it off of the road in some grass or dirt and then move it forward a few feet then simply hit reverse. Don't move much maybe an inch and it may release the bind. Once you get the bind off the transfer case, it should slip out of 4wd, unless there is damage in the case/shifter itself.

When operating four wheel drives, with tires of different sizes it causes extreme stress on the gearing in the transfer case. Larger tires don't turn the axles as much as smaller tires. So, this causes stress in the driveline as the front is actually turning slower then the rear. In turn, this will put so much pressure on the gears that it could cause damage and the shifting mechanism will not work correctly to pull it out of 4wd engagement.

Try those ideas, and see if you can get it out of 4WD. Definitely put four tires on the jeep that are all the same size. This will keep you from having excessive stress on the transfer case and gearing therein.

I hope this helps out buddy.

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