Here's a link explaining what a bad speed does. http://gadflyofthenation.blogspot.com/2012/03/how-can-you-tell-if-your-car-has-faulty.html
SOURCE: 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.
SOURCE: Horn, cruise control, and radio controls on steering wheel do not work ?
The clockspring behind the steering wheel is possibly defective or unplugged. It is the one and only component that all of your symptoms have in common.
SOURCE: The front end shakes badly when going over a bump
That and other bushings and idler arms worn. I would suggest a free inspection somewhere for them to show you what needs repaired.
SOURCE: 1998 Jeep Grand Cherokee Laredo 4.oL I got a code po113
Trouble Code: P0113 (4.0L L6 VIN S Auto)
IAT Sensor Circuit High Input
Print this code data
Number of Trips to Set Code: 1
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
Check with ignition on or engine running; battery voltage more than 10v; The PCM detected the IAT Sensor input was over 4.90v (exc. Dakota, Durango, Ram) or 4.98v (Dakota, Durango, Ram) for 3 seconds.
Possible Causes:
SOURCE: 1998 Jeep Grand Cherokee Laredo 4WD with loose steering
Did you tell the shop to do this or did they find something wrong with those parts? "wheel bushings" ??? Are you talking about hub bearings or ball joints? Bad ball joints can give you wandering or a really bad shake (called death wobble). Has anyone checked the steering box to be sure it hasn't started to tear off the chassis? Is it internally worn? There are too many parts up there that can make a noise for me to comment intelligently about that. If there, I'd need to test drive it. Check the steering damper (sideways shock that attaches to the steering linkage. that can allow wander over bumps. Also, adding alignment caster (more than factory setting) will tend to stabilize the front end. I run way more than factory setting on all of mine. It can wear the steering pump, but it only takes about a year off it's normal life if even that much.
So, you may get nine years from it instead of ten.
I hope at least one item I've mentioned helps you. If you don't understand any part of this or have a question, just ask!!
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