Glad you guys could make use of the info!

A few words of advice. One is, find SEAMLESS tube. A lot of places will tell you there is no such thing. Keep calling around until you find it. I found some at a welding place. You could probably find it at a trailer repair place too. Just ask for trailer hitch tube. The regular tube with seems will not fit together without grinding a notch on the male tube. Doing this will create a LOT of play in the 2 parts, creating a lot of vibrations. The seemless fits together without any grinding just like your trailer hitch.

Second, TAKE YOUR TIME! Make sure everything is centered and even. Make sure your yokes are lined up and in phase.

Third, add a bunch of grease fittings to the outside of the outter tube. Keep it pumped full of grease. This will take up any slack in the 2 tubes, and keep it from rattling and vibrating. You will need to remove all the grease fittings if you go rock crawling as they will break off when you hit the rocks. And you will have to pump the shaft full of grease about every other trip out as it seems to work its way out quickly. Makes things messy, but it really helps cut down vibes.


Do all this and you shouldnt have any major vibes up to 50-60mph. Its still going to vibrate a little, but nothing terrible. I needed the shaft to go at least 40-50mph as I wanted to drive the rig in 4wd on the highway to work when it snows.