I Might Just Know What I'm Talking About
Join Date: May 2003
Thanked 1 Time in 1 Post
Re: Odd Vibration between 35-45mph
Sounds like something in the front end. Take it to an alignment shop you trust or have heard good things about and let tham have a look. You can always double check their recomendations yourself and do the work yourself.
You can also check the ball joints and tie rod ends yourself. To check rod ends lay under the ffront of the Jeep (preferably) while it is shut off and parking brake engaged. Have a second person wiggles the wheel back and forth and watch for play at the rod ends. To check ball joints, jack up one front tire at a time, just an inch or two off of the ground. Take a large pry bar or pipe and pry upward between the ground and tire and watch for up and down play at the joints. It may take a second person to do the prying while you get underneath again and watch.
If you rotated the tires as the manual suggested I would think that you can probably rule out that being the cause. After chaing the tires around, the shaking should have at least changed some or "moved" to where you feel it differently. However, have balance checked on tires is cheap.
I doubt it's drivetrain related, but the clutch issue is interesting. Are you certain that the transfer case shifter did not get bumped partially, or got left in 4wd? Maybe a problem with one of the front hubs?