Vehicle violently vibrates when hitting a small bump or hole at times. Trying to slow down the car only makes it worse during these episodes and steering is very difficult. What can cause this
Re: Vehicle violently vibrates when hitting a small bump...
Check out the 'front end' at a garage to do a thorough shake down of components such as springs, tie rod ends, ball joints, shock absorbers, steering rods, bearings, etc.
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colbalt has a known problem with the intermediate shaft on steering column to the rack wears out there is also a ton of info online about the front end problem also check and make sure your cradle bolts are tight also check if your vehicle is or was in the recall [ elect power steering unit ]
check you springs you may have a broken spring also jack the wheel up one at a time and check the bearing hands 9 and 3 pull side to side and then up and down at 12 to 6 any excessive movement and the bearing needs changing. do this to both wheels. also check the anti roll bar rubbers all 4 of them check for splits or wear this can also make a clunking sound on bumps of any size. failing all these you may need to have your disc's checked as they may have become warped can happen if you use them alot ie hills, sudden stopping
Get the engine mounts checked. A bad mount may allow part of the engine to lie on a body or frame part, allowing engine vibrations to become very loud. Torquing of the engine (under load) can cause the same type problems.
Whilst not familiar with your vehicle, in mercedes it is called highway hop, and was caused by the universal joint(speed related) that goes to the gearbox,they also added a damper to the diff (weight, frequency related)), , in regards the leaf springs, unless the spring hanger bushes are totally knackered it shouldn't cause problems.
Look at
1)bushes
2)unijoints or excess movement of the gearbox output shafts
3)excess pinion movement of diffs(where the uni joint bolts on)
4)ball joints
5)?bent axle (rare but they do do it)
6)swivel bearings in the front diff
Not sure as to your front end set up, but this may help?
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