rear drivetrain vibrating and noise

[62-1gsx]

ok i am having this problem with somethin...my car drives and shifts perfect "BUT" while im driving between 20-25mph the rear passenger side of my car vibrates and makes a very loud vibrating noise...it will stop if i go faster or slower, but will do it non stop btween 20-25mph no matter if im on the gas, off the gas, clutch pressed in, or in nuetral..i cant figure out what it is...i replaced the bearings... cv shafts are fine...dont think its the carrier bearings in the drive shaft, cuz it does it when im coastin or in nuetral or the clutch is pressed..you guys got any ideas

 

[Old Mitsu Tech]

Well, at least you know the location. Is the vibration the same as your wheel speed? Or is a fast buzzy type of vibration? If it's buzzy, it's probably somewhere between your transfer and rear differential. If it's wheel speed, I'd seriously take a look at the rear wheel for being bent, out of balance and I'd take another serious look at the rear axle on the side that vibrates. Is there a bad sound associated with this? Grinding, squealing or such?
Let us know.

Good Luck

 

[62-1gsx]

it kinda has to do with the wheel speed...the grinding/vibrating speeds up the faster i go...but like i said once iget past 25mph it stops...from 0 to around 20 mph there is no noise or vibrating then as soon as it gets to 20 it starts then stops again once i get past 25 it stops...it dont squeel..squeek..just a very loud and rough vibrating type feelin and noise...just like wheel bearings do when they are about to basically fall apart...thats what i tought it was so i replaced all the them... and it still continued to do it...i had new tires put on and balanced...still did it... the car has been down for about 3 yrs..while i was building it..but before it was down it never did it... but since the first day ive it back on the road it has...picture the feeling and the sound of a flat tire drivng about 5mph with solid suspension..... flat tires get pretty rough the slower you go...thats the sound and feeling it makes between 20-25mph..it vibrates the car extremely bad..