Vibration in car after 80 MPH!

[45133Stanger]

As the title states... after I get up to about 70-80 MPH my car starts to vibrate.... and continues to until I get back down below 70...... im pretty sure it still does it even if im not giving it gas....... its kind of scary... don't know if its in the rear-end, or drive shaft..... or tires not balanced.... any opinions from experience?

[SN95N/A]

See if the dogbone is still on this car,u joints, or tranny mount check those and let us know what you find.

[45133Stanger]

the dogbone? is that the vibration dampener under the rearend? its still there... and check the mounts and joints for what? to see if they are tight?

[SN95N/A]

It could be wheel balance/bent wheel possibly..check u-joints for wear/slop and mount for lose/wore out rubber could be missing possibly.Just couple things to try and narrow it down.

[45133Stanger]

thanks.................

[SN95N/A]

I have alluminum driveshaft you can try too see if thats the issue,If you dont find the problem.

[45133Stanger]

ok, you keeping it or wanna sell? just wondering?

[redfirepearlgt]

Feel it in your seat or in the steering wheel? IF steering wheel its up front. If in seat its in the back as a rule. Check the items mentioned. IF no luck have wheels checked for balance and/or belt separation in tire.

[45133Stanger]

the rears are mt et streets... but now that you mention it I just bought the wheels... I haven't gotten them balanced..... maybe I should check them for wheel weights lol.... if not ill take them and have it done.... its the whole car shaking...

[slow86fiveoh]

I'd check and make sure all the tires are balanced out I'd think if it was a u joint it would do it above a certain rpm and not speed

[45133Stanger]

im praying its just the wheels not balanced....

[leroy93lx]

I had the exact same issue in my 88 and it ended up being the ring and pinion.

[SN95N/A]

Go 68-70mph should fix the problem:bigthumb

[redfirepearlgt]

IF you just bought them chances are it is a balance issue. I bought a set of GT500 wheels with tires a few years back. PUt them on and above 60 had a bad shimmy. Then I remembered that the car they came off of had pressure sensors and that these sensors were swapped over to the new rims. The next day I took them to have them balanced and sure enough the balance was whack. Drove like a newcar after that. Hope its nothign worse for you.

[84fox]

Always start with the basics first, balance the tires for sure , I manage a tire dealer and that's the number one problem. Second I had a vibration in the rear end as well before and it ended up being that when a certain place installed my new ring and pinion it wasn't set up right and only vibrated at higher speeds.

[45133Stanger]

thanks so much guys.... ill let you know when I get it to a shop and balanced and see..

[slow86fiveoh]

Well if its gears I have those 3.73's still

[Kevin1989]

My shit would do that at 70 and I had brakes sticking lol it sucked

[45133Stanger]

im gonna take it and have it balanced next Thursday.....