Just had the battery changed and now the car has a howling noise that starts at about 35 miles per hour, check inner wheel well found a screw missing with a gap in the plastic on the battery cover in the r/h wheel well, tighten this up thinking it was air flow problem. still have the noise.

go to the magicmechanic website and send him this--hes the best there is and will rply

A howling noise from a diff is an indication of the gear mesh( pinion to crown wheel) is not correct. Several reasons being worn pinion bearings--loss of preload on the pinion bearings --- crown wheel carrier bearings failing ---not sufficient preload on the bearings---wear on the teeth from incorrect diff oil in use. or simply wrong diff oil. The grade should be 80w90 OEP for normal or special oil for limited slip diffs.

i had the same problem with my olds. van it was a cv joint & a tie rod end

Get a different shop to check all of the suspension components - if the struts both snapped, something is going on that's a much bigger concern than the wheel bearings. Look for bent control arms and other suspension components - check clearances and bushings everywhere in the rear, make sure nothing was installed backwards or forgotten. Struts don't just snap, and bearings should definitely not die every couple thousand miles. Also, have a dealer look at it, to make sure that things are installed properly. It won't be cheap there, but they might notice something that other shops routinely miss. I hate suggesting that ANYONE go to a dealership for service, but in this case, they're the most likely to notice something out of spec...

Don't think it's missing. Low fuel. Check fuel pressure after regulator.

Take a close look at the tires, look for bulges and lumps. You may have a slipped belt. Where the rubber delaminates from the reinforcment belt embedded in the tire. If this is the case, you must replace the tire. Also look for missing balance weights. Around the rim you should be able to tell if a weight fell off.
Another very serious possibility is a failed shock absorber. A very rough test is to manually push / bounce one corner of truck down a few times then let go and see if it keeps bouncing more than one time, one and half max. Check all 4 corners.
Otherwise, possible bent rim, missing lug nuts, bad wheel bearing.
Good luck

check the axle shaft assy,an excessive joint angle due to incorrect toe-in or trim height,,,,,Wm or damage inboared or out boared joint,,,,,,,A sticking spider ( tri pot joint)

You probably have a bad hub bearing.If you can change the noise by slightly turning the vehicle one way or the other it is a hub bearing.If you turn left and the noise is still there then it is the right front bearing.If you turn right and the noise is still there it is the left side.If it makes the noise both ways it could be both front hubs.Hope this helps.Good luck.

well did the noise start after the tires were rotated?could be choppy tires,,,if not ,i strongly think it sounds like a bad wheel bearing,,,,if you drive and while its making the noise turn left and right quick and see if the noise gets louder and which way turning makes it louder,,if you turn leftand it gets louder its usually the right wheels bearing as you are putting load on it, if it makes the noise louder while turning right its the left wheel bearing,,,got it

Hey.......my 2003 Vue did the same thing. The rear wheel drive was bad. Had it disconnected and now I have front wheel drive. No more howling