So we have a 99 exp Eddie Bauer Auto 4wd. When the switch is on 4wd not auto it will kick out of 4wd and the dash will get all screwed up, mph all over the place. The 4wd switch does not work. turn the vehicle off, back on a couple times and it will right it self. Could it be the speed sensors on the transfer case, 4wd module? Other? Any ideas will be nice Thanks Chad

 

Based on the conditions you've described, I would think the 4WD module is the problem.

 

would it be located on the passenger kick plate area thanks

 

It's behind the right side of the instrument panel.

Keep in mind that the GEM is the actual brains for the A4WD system, but the 4WD module is actually just a relay pack. But when any of the relays act up, it doesn't matter what the GEM is telling them to do, so this is why you'll want to start at the 4WD relay pack module.

See the attached PDF for an image of the location.