If you are new to Panteras, then also make sure you are not chasing something that is normal for these cars. I think you will find a lot (all?) ZFs make a bit of noise and there is a bit of vibration. I have heard from others that after changing from the standard drive axles with universal joints to CV joints, what a big difference in smoothness there is... That said, also make sure the bolts to the drive axels are tight, the universal joints are O.K. and not spinning in their yokes etc.
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