Vibration My Civic starting vibrating at between 55 - 65 mph. Just had new struts and tires put on about 2 weeks ago. I didn't notice the vibration until then. What's going on?

Hi, you could check your engine mounts.

Chances are its a minor miss in one of the cylinders. You don't feel it neutral at idle or until the trans goes into overdrive because those times the engine is not working very hard.
If it is a miss fire the check engine light will come on when it gets bad enough to affect fuel mileage.
If you have not yet changed the plugs I would start with that. There is also a chance you damaged the engine when it overheated.

recheck balance and inspect threads can have a possible bad thread belt on tire

If there are no check engine lights could be a bad motor mount or two. Would have them checked. Try putting car in neutral and see if vibration disapates a little.

If you jack up 1 wheel off the ground and put the car in gear , you can watch the tire spin. You might see a bent rim. The shop that mounted the tires should have seen it and warned you though.

If you are sure the suspension is good and that the axles are NOT the problem then this leads to 2 things. Weak struts / shocks and possibly unbalanced tires.
Beings that your not feeling it in the steering wheel I would assume the problem lies in one of the rear wheels. If you at one time used a product like flat fixer and it is not evenly distrubuted inside the tire you will experience vibration.

Have all of your tires balanced and if you sitll have the issues with vibration at speed then you need to start looking at shocks and struts as the source of the problem.

Thanks for using FixYa.

Kelly

I just had the same issue with a 1999 2500HD and the vibration got worse above 50 mph. Problem was resolved with a new driveshaft. Old one (aluminum) was badly out of true and the problem didn't really occur until I had the U joints changed - then bent driveshaft vibration was noticeable. New driveshaft resolved issue.

check your universal joints

on both my Camrys, i had this problem. You could really notice it when you were driving down the road going 40-60 mph and punch the gas - car would vibrate, let off the gas - vibration stops, punch the gas - car vibrates...... On both, it was the CV joints. It is much easier to just replace the drive axles (with the new cv joints and boots already installed). For my last replacement, i think thy were only around $65 each.