My truck started acting funny the other day I was giving it a tune up and giving it all new fluids when I got done I was going through 4hi and lo. when I would turn the wheel it would try to go back straight. then after I shut my truck off the 4x4 wouldn't engage, when I started it back up again. however i did get it to engage once since the problem. I don't think that it is my t/c because it will still change the gear ratio when you put it into 4 lo and hi. So I think that it is in the front axel somewhere just don't know where.