Universal Joint question
I just bought a 1995 Ford F250 4x4 off a guy. It has 96,000 miles on. The guy at some point took to to the shop about a noise when he had the 4WD on. The mechanic said it was the Universal Joints and they needed replaced. I have never changed U joints on a 4WD vehicle. How would I go about changeing them on this truck, and is there anything else I should change while im changing them??

Thanks
their orientation to the shafts and to each other.
Somehow I got a driveshaft out of 'alignment' with the
u joint yokes and had to start over with no reference points.
It was hideously out of balance.


