2007 vibration between 74-80mph

[Trailblazzin]

Is the vibration felt strongest through the steering wheel or through your seat?

Have you visually inspected each of your wheels for dents our for being out of round? It doesn't matter that new tires were just installed.

Seat, I’ve swapped the wheels and tires with my dads avalanche still does it, it’s not the wheels and tires

 

[kbuskill]

the rear

Even though the weights may still be attached to the driveshaft, I would probably pull it and take it to a driveshaft shop and have them check it and rebalance it.

You could also check the bushings in the upper and lower trailing arms.

 

[Philpug]

We have been getting this for a while. We have tried everything. Her has the driveshaft balanced. Our driveline guy even put in the unusual cure-all a aluminum driveshaft, still there.

 

[Philpug]

OK, the vibration goes away when cruising along about 75 and put the car in neutral so it sounds like it might be the torque converter. Any idea what the rough cost of replacing the torque converter is and no I am not gonna do it myself

 

[exp500]

Just keep on driving it till the problem gets worse, If T converter, then by 200K you will need transmission too. Have you looked at trans and/or eng mounts? A little misalignment= shake.

 

[Philpug]

Just keep on driving it till the problem gets worse, If T converter, then by 200K you will need transmission too. Have you looked at trans and/or eng mounts? A little misalignment= shake.

IMO, it is not bad, I have yet to feel it..but the wife and others have and I am in the minority. I will have them take a look at take a look at the mounts.

 

[thompsoj22]

Rear carrier bearings will make an audible rumble and vibration as they get loose. If you are under hard acceleration through the 74-80 mph it should not do it as the carrier is loaded. But if you you are just crusing in the "sweet spot" ie 74/80 mph for your situation on flat/level ground the vibration will occur. If it is the carrier as you hit 74 mph and the vibration starts, roll on the power ie "load the drivetrain" and the vib should stop all the way through 80mph.

 

[BG1988]

OK, the vibration goes away when cruising along about 75 and put the car in neutral so it sounds like it might be the torque converter. Any idea what the rough cost of replacing the torque converter is and no I am not gonna do it myself

try changing the transmission Filter

MAKE SURE YOU REUSE THE OLD FLUID or chances are your transmission will be 100% dead of you don't..



also try a lower gear but same RPM though...... this is a easy "way to test it"