Ok, just had all 4 tires balanced and rotated thinking it would cure this, but it didn't.At around 35-40mph I get a noise similar to blowing air acroos the top of a 20 oz bottle from the rear...bearings???? And at 70-75 mph I get an intermittant vibration that feels like it is in the rear, as my steering wheel has no vibrations.....u-joints/poorly balanced driveshaft?? I need some insight please..[sm=feedback.gif]THANKS!this is my driveshaft

 

I had this exact same problem a little while back and it was inded the wheel bearing. Had it replaced and the problem went away and hasn't yet come back, so I assume it soled the problem.

 

yooper,Were you getting vibration also....kinda like the tires neede balanced?

 

sounds like the wheel bearing, you dont feel vibration when tires are missblanaced you kinda feel it more like shaking its hard to explain

 

well, I would classify it more as a shaking I guess........it shakes my a$$ in the eat...but the steering wheel is still smooth. My driveshaft is fairly pitted, does anyone think that could cause a shaky vibration like thing? It just drives me crazy!!!lol

 

Yes, I was getting vibration too. And everything was exactly as you say 35 the noise started and around 70 my blazer would turn into a shiatsu massage parlor. I would go have your bearings checked.

 

LMAO! Then where's my happy ending????Plan on checking the bearings today.....Don't I have to remove the differential cover too??? I'll check my repair manual.Thanks everyone

 

I would also look into the u-joints as this sounds similar to the u-joint problem I had a while ago. Now I am getting that clicking noise from the rear end (not too loud though, can only hear it when I drive by a wall), so I will probably be checking into rear bearings soon too.

 

thanks lenny!