Hey guys, so I've started noticing that when i'm on the highway at around 120-125km/h I feel a slight vibration from the back. Now this vibration isn't constant. It seems to pulse on and off. It would last about 1-2 seconds then stop for another 1-2secs and it'll vibrate for another 1-2secs.

I've checked air pressure on all 4 wheels, alignment was done last season. I've not been in any accidents/off roading etc.

Also this is not RPM dependent, it only happens when i'm at a certain speed.

Anyone have any ideas on what it could be?

 

its has to be the balancing of your wheels or slighty bent wheels.

when is the last time you balanced you wheels? any little curb bump or pot hole can knock off a weight.

i had the same problem and just took it in for a high speed balance.

 

Is your car lowered?

 

I'm pretty sure when I got an alignment, I also got it balanced. I guess I will take it into balance this weekend.

Some additional information, the vibration is felt mainly through the back of my seat and I may have been exaggerating about how long the vibrations last. They're more of a .5 second to a second long.

My car is lowered but I thought the vibrations for the buckets were only when you get off the line.

Thanks for the help.