Bad u-joints. Bent driveshaft, Weight that has come off of driveshaft.
A bad dent in the driveshaft.
it a toy that is shaped like a mans penis and it can go into the anus or vagina and it viabrates around causing plesure.
it could be the center support bearing in your driveshaft
Either the exhaust pipe is hanging down and needs to be held up and away from your driveshaft, or the driveshaft is bent and is bowed (probably from traveling fast in 4 wheel drive, putting to much strain on it). which is going to cause it to swing wider and into your exhaust pipe.
A sound wave begins with a viabration wich disturbance that travels through a medium as a lontitudal wave.
It is possible the seal is just worn out but check the driveshaft u-joints. If a u-joint is bad it could cause the driveshaft to wobble putting extra strain on the rear seal.
there are 4 u-joints 2 for the front driveshaft , 2 for the rear driveshaft and dont forget c-v joint the half shafts cause vibration as well
Tires and wheels out of balance. Bad u-joint in the driveshaft.
Could be a bad "u" joint, or may your driveshaft isn't balanced.
the driveshaft is found between the?Gearbox and Differential
it can be a couple of things such as hubs,driveshaft,u joints or fluid levels
unbalanced wheels, or unbalanced/driveshaft good luck
Inspect the driveshaft, look for dents, undercoating or buildup, or driveshaft or companion flange out of balance, check for missing weights on shaft. Try removing driveshaft and reinstalling 180 degrees different.