Vibration issue, 08 impala SS
It starts at around 80-95 km/h (thats where its at its worst) then it seems to level off (still there but not as bad). I can feel it in the seat, but not in the steering wheel so that makes me think its in the rear end.
It doesn't vibrate when breaking unless i'm doing 140+. I took it for a run tonight and at around 185/200km/h it starts to get what i would describe as a screech (sounds like a rotating screech, so not constant, but intermittent screech). I'm not 100% certain it wasn't the wind, but it seemed pretty constant to be wind...
My thoughts are it could be one of these things:
unbalanced tires (though that doesn't explain the noise)
wheel bearing (gave the rims a tug and they seem to have no play in them)
Any suggestions would be much appreciated... I really want to take care of this car and am still learning so any insight on what to check or what it could be would help. The car has 51,000 km on it.
thanks for your time!
I did notice some dust/dirt stuck to some of the weights so i washed them and took it for a test drive.. the vibration is still there but seemed to be a little less.
Gonna take off the front tires tomorrow and have a look & wash the inner rim.. if the vibration doesn't go away completely im going to go to the tire shop in a couple days and get all the tires balanced.
also took off the locking nuts (they were heavier than the regular nuts) and no change really... going to see about balancing them tomorrow.. there seems to be an awful lot of weight on some of the wheels (and they're crooked as hell...)
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(i need to do the left side, should i also do the right side?)
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and im clueless, that is so freaking weird, you sure its not the road? is it that bad? i mean a little vibration may be normal..
and i was speaking to a mechanic at my work who used to balance high performance tires in a speed shop, he said the number 1 thing you need to do when balancing is to remove the old weights and start from scratch..
the cheap *** tire company KAL TIRE didn't do this, they just spun them up and said ok more weight here.. and one of the rims has over 4 oz on it.. way too much (rim's in perfect condition) meaning who ever originally balanced them was chasing the weight around the rim.
edit: i'm going back to crappy tire and demanding they balance it again properly for free, paid 120 for a balance and they just screwed up my highway driving enjoyment.
this means either the rims are bent or the balancer didn't know wtf they were doing..
i'm really at a loss with this vibration issue..
on top of all this I'm pretty sure my brakes warp when they are hot.. so hopefully with the new breakmotive set i'll be putting on next week some of the vibration should be gone.
As for the balance problem.. i'm going to start looking for the same rims or maybe buy a new set of 20'' x 8.5'' and just keep the rubber.
my dad suggested i take the wheel with the least ammount of weight off and swap it for my spare tire, then change out every other tire to make sure its not in the front end or a belt sepparating on the rubber... though with that amount of weight on the rim i cant see the cause being in the front end as the balance I had done by Kal was an off car one
Last edited by lunchbox_89; Aug 4, 2011 at 08:52 PM.
this means either the rims are bent or the balancer didn't know wtf they were doing..
i'm really at a loss with this vibration issue..
on top of all this I'm pretty sure my brakes warp when they are hot.. so hopefully with the new breakmotive set i'll be putting on next week some of the vibration should be gone.
As for the balance problem.. i'm going to start looking for the same rims or maybe buy a new set of 20'' x 8.5'' and just keep the rubber.
my dad suggested i take the wheel with the least ammount of weight off and swap it for my spare tire, then change out every other tire to make sure its not in the front end or a belt sepparating on the rubber... though with that amount of weight on the rim i cant see the cause being in the front end as the balance I had done by Kal was an off car one
Good luck tho..
Good luck tho..
edit: If it turns out the balance doesn't do anything i'm going to get these:

Last edited by lunchbox_89; Aug 5, 2011 at 09:45 PM.

