[andrewb70]

Originally Posted by gearbanger

Okay, so I just came home and got out my old 67 model upper control arms, and the best I can measure, these have no offset at all. So maybe 70 is different?

I wish I had my stock arms around so I could compare. It's also interesting that you have a vibration. What kind of driveshaft are you running? Material and diameter wise.

What are your front and rear working angles? Is it a high speed vibration, similar to what I have described?

I do plan on getting one of those laser driveline alignment tools. I think it will work very well in determining exactly the exact alignment of my driveline components.

I have also explore the possibility of having a dirveshaft made using CV joints instead of u-joints. I don't mean the cardon style CV joints that are used on 4x4. I mean true CV joints that are used for halfshafts on front wheel drive cars and cars with independent rear suspension. BMW rear ends are setup with pinion yoke that take Porsche 930 style CV joints.

The Driveshaft Shop has been building driveshafts with CV joints for various applications. Thus far they have focused on IRS applications, but their latest is for 2005-2011 MUstangs that have a live axle setup. It seems that some of these cars have high speed vibrations as well. The problem is that nobody makes pinion yokes or transmission yokes, that accommodate CV joints, for domestic rear and and transmissions. Maybe The Driveshaft Shop will step up top the plate and offer something unique. Using CV joints at both ends of the driveshaft will render any sort of driveline alignment issues, mute. CVs can operate at high angles and the relationship of the front and rear angles is irrelevant.

Andrew