i have a 97 automatic and have been hearing some noises under the car. Tonight i jacked it up and looked to see if I could figure out what it was. I started shacking the tranny to see if it was loose and then i shook the drive shaft and i could shack it back and forth and it made the noise i was hearing. My question is are you supposed to be able to shack the driveshaft like that or should it be solid with no shake to it. Thanks for your help.