HELP!!

Are the bolts holding the driveshaft to the rear tight? I know mine like to come loose, so I check them everytime I'm under the car.

as 95strokerPSU stated above check the drive shaft bolt and also make a visual inspection of the whole vehicle checking for loose bolts on wheels,axles driveshaft,check all bushings and bearings,shocks and mounts while inspecting tranny and motor mounts for damage ect....also checking tires and wheels for damage,cracks ect...and about the front end vibrations the front end shop should have diagnosed that problem for you. i would return the car to the shop and have them inspect the front end properly around here a front end alignment includes repairing and diagnosis of all or any worn or damaged parts that may cause problems with the front end and any reputable shops will not give you an alignment until all problem diagnosed are fixed...