General Maintenance & Repairs - Vibrations at 1000-1400 rpm...what could be the culprit?
08-29-2005, 01:33 PM
alrite guys ive asked all over at every shop in town about this....they dont know anything to put it nicely.....as the title states i get these vibrations through the steering wheel, my ass, and the gas pedal when just cruising my TA around 1000-1400rpm.....one mechanic said the engine felt off balance....i dont beleive that at all.....i noticed when i put my car into reverse the exhaust does vibrate off something in the rear.....i dont know what it could be just wondering if anyone else has had this problem with vibrations at cruising speeds around town 25-30 and 40-45 mph then its gone after that.....ive already went and bought a crank pulley because the GM Tech told me thats what it was....suprise he was wrong and i still got a bill :bang: .....hope u guys can help it really hinders me enjoying my car....not to mention im going nuts. :eek2:
08-29-2005, 03:06 PM
I was getting major vibrations for a while....right down in that rev range....all due to my exhaust. In my experience, nothing will screw with how my car feels more than my exhaust just getting a little loose. And it doesn't help that my Loudmouth fits like CRAP (mostly due to the lack of them including a passenger side hanger). I had a situation where my tailpipes were vibrating up against my back bumper cover, and resonating all the way up the car. Also my exhuast was coming into contact with that structural piece that runs across the middle of the car (think its called the panhard bar). And when the bolt holding my fabricated passenger side hanger comes just a bit loose....feels like all hell broke loose. So i'd say tighten that baby up as tight as she'll go. Also don't know if you have sub-frame connectors or not....if not get some weld in boxed ones. Could also be a motor mount gone bad or a tranny mount gone bad. All possibilities. Good luck!!
08-29-2005, 03:47 PM
no subframes yet but theyre next on the list.....yea im kind of suspecting the exhaust as well due to it vibrating on my back bumper every morning when i back out of my driveway.....but that was going to be my next mod after the subframes....ill have to run it up on the ramps tonight and see if i can get the stock system all situated in there for now.....thanks for the help it's really appriciated.
any other comments or experiences like this would also prove helpful im sure.....ill get under the car tonight and post back if i have any luck.
08-29-2005, 10:01 PM
I'm thinking that either the tires need balanced, or the driveshaft is out of whack.
08-30-2005, 12:23 PM
I've heard that d-shafts can vibrate at certain speeds if out of balance. Tires vibes seem to be speed-related...the old "at 65 it sucks,at 70 its ok" thing. Might as well check everything.
08-30-2005, 09:08 PM
it does it in park as well so i dont think its the tires or downshifting.....cant see anything with the exhaust im going to check it out again tonight on ramps.
08-30-2005, 11:43 PM
I actually get a vibration that sounds like it echos thru the trunk area... and I only get it after the car has been driven/warmed up for a bit... and ONLY around 600rpms and then nothing..
I don't get it... It's getting real annoying and I have a full warranty... I wanna say its the exhaust... what else could possibly cause a vibration like this from the rear end??
09-01-2005, 09:33 PM
well i finally got around to checking things....everything seems good except the y-pipe (factory) when i hit it, it rattles quite a bit.....it seems like its rusted from the inside....are the factory ypipes dual walled?....and if so could this be causing this vibration im getting at only these certain rpm's?
09-02-2005, 11:21 AM
09-03-2005, 10:29 AM
id bet its your exhaust.
i have the same problem and i know its my exhaust
09-05-2005, 08:38 PM
I'm fairly sure I have the same problem, but I've not figured out what it is yet. I also get it in park so it's either engine or exhaust related.
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