I was getting a vibration so i checked out the ujoints and sure enough they had play in them so i decided to replace both of them, i just removed the drive shaft with out marking anything be ause i was told that i didnt have too because this truck is just a single drive axle 4x2 so anyway here i am a week later with the same vibration again and with bad ujoints
my question is was i wrong to just remove shaft without marking and now i have something screwed up (is there a way to make this right again) before i put new ujoints in again

thankyou for your help