[WSSix]

At this point, I don't know how else to solve this issue without being thorough in my methods. Nothing is obviously the culprit. I'm also still concerned I may have more than one problem.

I played around with the car today but didn't swap axles yet. With the new tires on the car, the wobble and vibrations weren't as pronounced. So I decided to swap wheels front to rear instead of just going straight to swapping axles. The low speed vibrations at 30 mph are pretty much gone with the front wheels on the back now. I decided I better try 65 to see how it felt there considering that's where I get the vibrations when driving the car and not just sitting on jack stands. I was only going to 30-35 on jack stands because that's all I needed in order to get the vibrations.

The vibrations are definitely there at 65. 55 feels ok but 65 is very different. I got the vibrations with the wheels on or off the car. This leaves me confused in all honesty. My thoughts at this point are to pull the axles and run the car up to 65 with just the differential in place. If I get vibrations, it's in the driveshaft/pinion angle. If not, axles. I have a Detroit TruTrac differential. I'm going to read the manual as well, but does anyone know if running it without axles in place will cause a problem?

I've gone through 6 degrees of sweep with the pinion angle in 2 degree increments previously. Nothing changed one way or the other from what I could tell. If it's driveshaft/pinion related, I'm going to be more lost than I am now, lol.

Jay, I have a modified 8.5" 10 bolt with Torino bearing ends welded on.

Also, before I pull the axles, I'll most likely go drive the car with the wheels swapped front to rear. I want to see if the vibrations also move. While I had the wheels and tires checked and they told me the wheels are good. I'm not sure why I don't get the vibration with the front wheels but I do with the rear wheels.

The one good thing from today is that I've determined I can indeed run a 9.5" rim and 275 tire on the front without too much trouble. Yes, minor inner fender work and lip rolling will be needed but I already planned on that anyway. I'll start the hunt for some factory 9.5 rims soon.

Thanks