Posted by gordon maney, power wagon advertiser on May 30, 1999 at 14:59:06:
In Reply to: u-joint problems posted by robert duddles on May 29, 1999 at 06:40:22:
In addition to the possibility the assembled shaft is out of phase due to improper assembly of the slip joint, as previously mentioned, it is possible your drive line angles are not right. Essentially what that means is that the output shaft of the transmission and the input shaft of the transfer case must be parallel with one another in any plane. Come up with a tool allowing you to measure the angles of each shaft from a level plane. That will tell you if they are parallel. If not, take the necessary corrective measures.
I don't buy the notion that "some rigs just do that...." Another question; what is the condition of your slip joint? If it is loose, the shaft will destroy universal joints. Loose slip joints in front drive shafts are common cause of universal joint failure.
Are either of the drive flanges on the shafts damaged or worn in such a way as to present unsatisfactory mounting surfaces? The universal joints in that particular location have probably the easiest job of any on the truck.
Visual inspection.... visual inspection.... and more visual inspection....