If 1995 jeep Cherokee limited had new tires installed and one size smaller on rear vehicile was driven20 miles Tires have all been replaced Vehicile has bad front vibration Any ideas?

Answer 1

First, you should have the same sized tires on all four wheels. You probably already know this and I wonder why you decided to use different size tires on front and back.

This combination of tires may be accentuating an already existing problem with your tie rods or suspension. When you start messing around with different sized tires you will be throwing the computer out of wack and causing other problems that you may not have had before. This will especially be apparent with the Quadratrak all wheel drive transmission.