I had mentioned that the rig has a bad vibration somewhere around 45-55 mph. I have yet to have the drive line balanced, but did some research on driveshaft "phasing". I had taken the 2 piece shaft apart when I put new U-joints in it. Just made it easier to handle while using a press by myself. Anyhoo... I marked the 2 halves before I separated them so I could slide them back together the same way it came apart.
I either screwed something up when putting them back together or the drivline was out of phase in the old frame and I just never noticed.
The transmission yoke was off compared to the rear end yoke. So I unbolted the U-joint straps at the rear end and then separated the 2 halves again. Leaving the transmission side still bolted up by the carrier bearing. I was able to "clock" the rear half 2 splines over on the slip yoke and now all of the U-joints were in alignment with each other.
Took it for a quick test drive and the vibration is pretty much gone! I have some road feel through the steering wheel and front end. but I have to still get the rig to a professional alignment shop. I am still going to get the driveline balanced as well.
Stay tuned...
Gary