Why is this?

[95Trooper]

I remember awhile back I test drove an 89, 92, and 97 Jeep Cherokee 4x4 and I was trying the 4 wheel drive out and I was going through some grass and went a little too far and landed on the pavement while driving the '89 and it started shaking/vibrating etc real bad and when I backed up into the grass it was fine. I tried both of the other Jeeps and they did the exact same thing. Well awhile back I bought an '88 XJ and it does the exact same thing lol I was curious if it'd do it and i let the front tires touch the pavement and it started doing it then I backed up real quick. Why do Jeeps do this? I've never seen or experienced any other 4x4 do this before. I know you're not supposed to drive on a paved road and I didn't do that I just had them in 4x4(hi and lo - it did it in both) and let the front tires touch the pavement and when it did it I would back up. Why do they do this?? Let the Jeep jokes begin

 

[RenegadeT]

no need for Jeep jokes here, its the dumbass driver

In 4x4, you were binding up the wheels on pavement. You need to have a little bit of slip under the wheels to unbind 4wheel drive. Chances are the ratios in your axles are not exactly equal (....one axle may be 41:10=4.10, and the other axle just made up examples45:11=4.09). This difference is made worse when you try to turn and the outside wheels need to roll farther than the inside wheels, hence it binds/bucks/jerks/skips whilt it drags a wheel or pushes the other.

 

[twistedjeepster]

I have never had that problem and I have owned two cherokees '84 and '98 and have driven them both in 4wd on paved roads at one time or another without any vibration.