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Road rumble on rear

I am getting a rumble from the rear when driving, I changed the shock absorbers at the rear and also the anti roll bar bushes, but still I get the rumbling, I have checked the exhaust and that seems fine, any ideas??

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  • jim griffiths Feb 16, 2012

    I have normal road tyres on the car, I have just had 2 new front tyres fitted, the rumble happens all the time and sound like the suspension is hitting the bump stops when I go over a bump, it sound as though a wheel bay be loose but they are not, I wonder if it coulb be caused by the front shocks??

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  • Contributor
  • 19 Answers

If you have rough terrain tires on that could be a cause

Posted on Feb 16, 2012

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no you cant grease a cv joint, it is a sealed unit and comes pre greased! when you turn sharp at slow speeds does it sound like rocks rolling around in a coffee ca? then its a cv axle! also check large boots at both end of each axle. if the boot is torn the cv axle is either bad or will need replaced very soon! yes a back yard mech can replace easily but you will need a front end alignment when you are done! hints for replaceing! pop axle out with a pry bar at trasmission., to put back it use old end nut only 1/4 of the way on and hit with a hammer to seat lock ring then check at tranny to make sure it is seate! hope this helps

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Hello!
Perhaps you may be looking in the wrong area, have you checked tyre pressures? also tyre condition? you have obviously had the tracking checked? If all these are o.k. maybe a Brake caliper is binding slightly on the nearside wheel?
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Clunking noise in the rear of the vehicle is a broad statement. When is the vehicle doing it? Is it all the time or just over bumps? Is it happening only going around curves? Is it a constant bump that speeds up and slows down with the vehicle speed. You would be supprised how many clunking noises can come from the driveline not the suspension. It could be anything from a bushing to your rear differential getting ready to grenade.

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SOURCE: 1997 chevy blazer 4wd 2dr 4.3 engine ls package

check the front torsion bars for play or slack, these trucks love front balljoints check them with the truck jacked up under the control arms with a prybar lift the wheels up and down , also the rear diff torsion arms and the rear springs for broken leafs, also could be a camber/caster issue you may have the allignment checked please rate this -jeff

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SOURCE: squeaking front suspension

Lightly press on the brake when you hear the squeeking. then it's just the brakes pads rubbing. then have them inspected. good luck

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Hi Yameekia, Chock the front wheels, loosen the wheels, jack up the rear end and place chassis stands under the vehicle and then remove wheels. You will see a torsion bar connecting the left and right suspensions. The bar is sometimes referred to as an anti roll bar or a stabilizer bar. It is attached to the body with saddle clamps with rubber bushings, replace both bushes. At either end you will see that the anti roll bar is attached to the suspension by flexible linkages. These are small rods with small ball joints at each end. When worn these same ball joints make a lot of noise, hammering out a drum roll with each bump in the road. Replace those and I believe your problems will be over. You mentioned replacing the rear shocks....what about the front? Did you know that the shocks are not there to give a comfortable ride but instead to hold the tyres in contact with the road surface. They are a safety requirement for road holding, so with that in mind, have a good look at those too! Regards John

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Check that the rear section of the exhaust system has all the hanger brkts and supports fitted.
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Tire Noise


Hi,
This could be a combination of things. I'll suggest them and see how you go.

The tyre pressures have the most effect on road noise. Strangely there is more transmitted noise when tyre pressures are correct. Under inflation cuases a cushioning effect, whereas over inflation can make the tyre profile balloon reducing road contact.
Check that they are in limit.

Tyre tread profile can produce a humm if there are straight lateral bars. Good designs use offset bars to reduce this effect.

Cover any loadspace, and ensure sound deadening panels are in place.

Shock absorber top and bottom bushes come in different relilliancies. Hard provide tighter handling - but allow more road noise, soft absorbs noise, but allows more roll.
These bushes harden over time - thus transmitting more noise.

Shock absorber seals can swell enough to make a shock "sticky" - thus transmitting more noise.

Other suspension bushes likewise harden and become more solid with age.

So, - If it is bothering you, Check tyre pressure and condition. Cover loadspace with sound deadening material - A rubber mat in the boot works wonders.
Inspect rear shocks for wear/ corrosion.
Remove and replace bushes with new.
Replace shocks with new if required.
Inspect suspension bushes, & replace if cracked or perished.

This should solve the problems for you.

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