My '94 4x4 started acting up the other day. It developed a very rough vibration only while in drive. The slower I'm going or the more throttle I give it the worse it is. It's not as bad from like 45mph and up. Also, If I put it in netrual the vibration completely goes away. Any ideas?

Thanks,
Jesse

 

My first thought would be the U-joints. If you move slowly in reverse or drive, is there a rhythmic chirping/squealing sound?