This is not for AWD rigs and possibly snow and sand, anywhere your speed is erratic.
The reason I said snow is because I like to lock my hubs in the event, and I can choose to engage 4WD or in dry, higher speed areas 2WD. If your hubs are locked or AWD the shaft will spin. It don't take no Rocket scientist to know the square tube shaft is not balanced, and will shake your teeth out at speed.
Its a great, simple, get you home in a pinch, mod that IIRC the first article I saw it in, the guy had it where it could work in the front or the rear
use just a u joint on each end. you will not be running in 4 wheel drive over 30 I hope. I wish that I had with my wifes and may redo it.
when I unbolt the drive shaft it binds up about 6 inchs below the diff. I would like more movement then that.
I also ran three lines of braze down each side.. not rattleing yet!
had to grind the brass a bit so it would slid in nice and tight.
line this part up square for phasing. This is a short piece of the inner to line up the larger outer. just weld the inside.
oh and the sliding end of the outer shaft. don't leave a sharp edge. grind it out to a pretty good ramp. so when you drop it onto a rock it won't bind up.
My dad brought that to my attention, as we were shopping in Tractor Supply for parts on our buggy when there was a 4wheelparts across the street, funny thing is, the cashier says he sees more people with 4wheeldrives in there than at the 4wheelparts store...
Nah. I have done about 55 MPH in the snow in 4 high with a square front and it wasnt loud nor did it vibrate at all. Mine makes a clank clank from time to time and thats it. If you make your shaft very precisely they wont make much noise at all. my friend made mine for me and it was probably his 9th or 10th that he made. very quiet, very little vibration.