ok this is the deal, i took the drive shaft out with out marking where it was. is this bad? can i just put it back in with out worring about, please help quick thankls.

 

Well, sometimes putting it in out of phase the way it came out "can" cause a vibration. Sorry to say its too late now but the good news is you have a 50/50 chance of getting it right.

Just stick it back together and if you get no new vibrations, dont sweat it.

 

I took mine out without marking it, if it vibrates I just spin it 180.
I think I am going to put new Ujoints in though so it won,t matter.