Adam03GT

So it all started right after i got my exhaust done. At first it started as a small vibration which sounded like it came from the rear of the car.

Now when i do anything above 50 mph i get this overwhelming vibration throughout the entire car......

I have had the car back on the lift 2 times and they say it all checks out and that the vibration is just the exhaust and that i am not used to it.......

I have had an Offroad X and flows before so i know what the exhaust sounds like and what drone is but is this normal with MAC mufflers?




Just trying to make the best description so that i may get a better answer. I would describe the vibration as coming from a car which needs a wheel alignment badly. When i barely hold the throttle it goes away 90% but the second i am coasting the vibration is there.

Roush2002

double check and make sure that there are no flanges in the exhaust system resting on the floor board. I had a bad floor vibration and it was the exhaust flange hitting the floor board. I am sure the installers looked for that but you never know.

btw...I had a o/r x and that is not what your problem is.

reznap

Get your tires balanced

WhiteFoxGT

Is the steering wheel shaking or is it more in the seat

mustangman03

make sure your driveshaft is tight and all of your tranny mounts are tight also

gunpig0313

Check and make sure the exhaust isn't rubbing up against the suspension or the rear sub-frame. I had the same problem about a month ago put it on the lift and the exhaust was hitting on the sub-frame on the right side of the car.

PaintballFreak

I had one of the flanges on my mac catback rubbing my driveshaft and it was making some vibrations until I adjusted it. They surely would have seen that under a lift though.. Good luck

medrick

def check the driveshaft (4 bolts at the rear end). mine has come loose twice and shudders really bad.

Adam03GT

Those are all things i will check, however as far as the tire balancing and stuff, i would just assume it is the exhaust since it didnt begin until it.

Just got home and it is getting worse... Its vibrating my rear window like a 12" subwoofer would... Dont even have time to mess with it until thursday FML

Adam03GT

More info i just observed and forgot to add.

I can hear the noise at idle while standing behind the car. Im certain it is coming from the passenger side and after the axle however i still cannot locate it......

Im wondering if when it goes over the axle the top part is hitting the bottom of the car. I guess i won't know until i get it on jackstands on thursday....