Balance that driveshaft!

[Pedigry]

Hey guys,

I have been chasing a very slight rear end vibration in the third member for a minute. My driveshaft is aluminum and was built by the driveshaft shop, a good reputable house. I never thought to get it balanced because they do good work and people swear by them. The car is apart getting the engine rebuilt so I thought, what the heck, ran it down to the local driveshaft shop in orlando and sure enough, it was out quite a bit. If you have a rear end shake it may not be the pinion angle after all, your DS might just be a little out of round or out of balance. Just food for thought.