I have a major issue with my car and I need you guys help....I got my cars clutch changed...Ever since the car runs pretty good, the clutch doesnt slip at all, but when I approach the speed of 55-70 or higher it feels like Im riding with a flat tire. It vibrates like crazy, my girlfriend doesnt seem to have a problem with this but I do haha... Please help...It feels like something is loose under the car..but I cant tell.Thank you all

 

No warranty?

 

Nope not anymore...The freaking dealership around here flagged my car......im warrantyless Ive prolly put 1500 dllss in to the car and not for mods...All for factory **** that snapped .....2 clutches...axles...knuckles....I dunno why but Im in love with the car and I cant get rid of it...i just kept dropping money on it till I said what the hell might as well start modding...now everything thatgoes to it will be performance...

 

what made the dealer flag the car? what are your mods??

 

Im from a small town, The only red cobalt ss/sc with dual 12 inch black racing stripes...They knew i was racing so the bored bastards decided to catch me on camera...This was not even at a track and i was unaware of it....What made it worse was the tires hahah they were bald...and my clutch gone...Too bad

oh yeh now i have the 60 lbs and 2.8 inch pulley..i have trasnmssion mounts too..and the airbox mod. Im waiting on the meth injection and not planning on going stock again...

 

So i guess noone has any ideas?

 

check your lugnuts.

 

You didnt say where you thought it originated from front or rear.
Does the steering wheel ocillate when you let go of it at that speed .(front tire balance ,could of threw a weight )
If not could be a bad tire in the rear(shifted belt from hitting a pot hole)

 

maybe on the instal a little peice of the flywheel was broken, throwing it out of balance

just my first thought

 

Im getting new tires on it tommorrow we'll see how it goes. Thanks for all your help and support

 

Yeah i would agree by starting simply by checking your lugs to make sure everything is on right. One that threaded off would cause that to happen at higher speeds. Or even your allignment could be off which causes your car to vibrate at higher speeds as well. I would check out the simple things before going into more costly things!

 

Lugnuts, New Tires, Wheel Balancing, and Alignment.
You should be good again.
BUT, maybe build a vibrator into your passenger seat! I'll bet you get waaaay more road head.

 

I've had that happen to me (broken belt) and the car started bucking at around 90km/hr

 

make sure they tightened the main spindle nut on the end of the driveshafts, sometimes the shafts themselves also seem to be seated in the tranny but are not. or check the main hanger for your intermediate shaft that mounts to the back of the block.

 

Ok thanks for your help everyone...The rear tires were bad...you could already see the steel in some parts of them.....I found some cheap replacements just for right now..the brand is wanli and the size is 235/40/18 for 85 dlls a pop the car feels smooth as silk ..And i think the tires might not be so cheap after all.. they ride pretty nice..and have a 25000 mile warranty..

 

this was all for bad tires that you could see the threads in??? ugg

j/k... but that should have been ur first clue.

 

25000 mile warranty = more than likely pretty cheap tires...you really can't put cheap tires on a supercharged and expect it to perform as well. Hopefully they are rated the same as the Perilli's were.

 

they are rated W. So they should do pretty good. Took it to 140 and felt just the same as the Pirellis.

 

they are rated W. So they should do pretty good. Took it to 140 and felt just the same as the Pirellis.

 

they are rated W. So they should do pretty good. Took it to 140 and felt just the same as the Pirellis.

 

they are rated W. So they should do pretty good. Took it to 140 and felt just the same as the Pirellis.