• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

2007 Grand Prix GXP vibration and shudder issues

Paintball0027

Paintball0027

New member
My car was driving just fine for about a year with the Traction Control lights on and brake light on, but it was time for inspection so I thought I should replace the wheel bearing (Thought this was the issue).

So I replaced the front passenger wheel hub. Once I did this, my car started to vibrate insanely bad (Wasn't vibrating before). This was in the wheel and a little underneath the pedal.

So, I checked the other wheel hub and replaced both tie rod ends. After doing so, the vibration was there, but not as bad.

So I went and got new tires and an alignment. This solved some of the vibration, but still was vibrating semi-bad.

After doing some research, I read that a bad CV axle could be causing vibration. While I was replacing the passenger wheel hub, I had to hit rather hard on the CV axle to get it loose from the hub. Thought maybe I had damaged somehow. So I got this replaced.

Vibration seemed to be mostly gone. Then a few weeks later I was driving and got up to about 65-70mph and all of the sudden I felt my RPMs jump up and then drop down about 500rpms. This was the first time this had happened.

Now, it does this around 3rd and 4th gear, mostly while cruising at one speed 45-50mph. So thinking possibly the drivers side front CV axle could be bad, I replaced that today. Just took it for a drive and I think I finally got the vibration issue handled, but now I still have this shudder feeling while coasting.

Any ideas? I took it to the shop before doing the drivers side front CV shaft and they said they thought it was my tires, and possibly something with the transmission, but they doubted it (Not sure i'll go back to that place).

thanks.
 


Find a flat backroad or empty parking lot, get to 30-40 mph, take hands off wheel, take your foot off the gas and coast. Does your car pull in either direction?

Next when coasting apply a minimal amount of breaking not enough to really slow, but enough to have breaks apply, does the pull/shudder go away?

A minimally dragging break can cause a shudder when freely coasting and be light enough to not cause much of a pull unless you aren't controlling it.

When you purchased your tires, did you mount them yourself or have it professionally done? Severely off balance tires can cause some shuddering issues as well.

Sent from my ASUS_Z00TD using Tapatalk
 
No pull in any direction. Brakes are not dragging either.

Tires were mounted and balanced 2 times at discount tire. Bought them there. They are Cooper cooper zeon rs3-a.

I'm not feeling the vibration anymore. It really feels as if the transmission has something going on. Seems to shudder when shifting from 3rd to 4th. A weird feeling. I know the transmissions on these are notorious for going out.
 
Drive it at speed where you feel the vibration and change gears. I was recently reading my gm service manuals on this subject and that seems to fit your situation and will help verify if it is the transmission or not. If you change gears and the the vibration goes away that would point to transmission problems.
 
I like that suggestion. GXP have the manual mode which allow this.

Sent from my ASUS_Z00TD using Tapatalk
 


You must log in or register to reply here.
Back
Top