Hey guys, I bought an 04 XE with 104,000 miles with a messed up 4x4 system. 2wd, drives perfect. When driving in a straight line on pavement in 4hi or 4lo, the vehicle violently shakes and vibrates. 0-5 mph and immediately starts shaking the entire vehicle. Feels as if the system is in a bind and have to force it to move forward. The 4x4 works fine in dirt and if all tires are in the air. When in the air with axle locked 4hi, the front wheel spins slightly more than the rear. The front turn about 10-15 degrees more than the rear. I am thinking someone rebuilt or swapped the front diff with the wrong gears. Am I on the right track? Has anyone ran into this issue? By counting axle rotations, I estimate a 4.6 front and 4.9 rear. I have been searching for days for relatable issues and this is the best I can come up with. I have checked most of the 4x4 system Also, If this IS the problem should I regear the front to match the back, or buy a used LSD that matches the front?