I've got a 99 blazer ls and when you accelerate hard, I get a "card in spokes" sound out of what sounds like the right front wheel and it get louder as I come to a stop, but after I stop it goes away until, I get hard on the accelerator again. 4WD works fine and there's no vibration, evrything is tight up front and there's no unusual wear on the tires. Does anyone have any suggestions on what it might be?

 

Replace your hub / Front wheel bearing unit, Timken Brand about $100. While you are there, you might as well jump into the upper and lower ball joints and also check your CV joints for play. About $200 in parts per side and good solid piece of mind.

 

now i've found out that when it makes the noise if i put it in 4wd it stops. what might that be?