Go Back   tbirdforum.com > Tech Forums > Wheels, Rims, and Tires

Wheels, Rims, and Tires Talk about your Custom Wheels, Rims, and Tires here.

Wheel Balancing & Tire issue

This is a discussion on Wheel Balancing & Tire issue within the Wheels, Rims, and Tires forums, part of the Tech Forums category; Hi All I have a pronounced shaking at 65 MPH I have had the wheels road force balanced, the suspension ...

Reply
 
LinkBack Thread Tools
  #1 (permalink)   IP: 66.176.249.39
Old 07-24-2016, 09:46 AM
 
Join Date: Jul 2016
Posts: 24
Rep Power: 0
Ed Raabe is on a distinguished road
Garage
Unhappy Wheel Balancing & Tire issue

Hi All I have a pronounced shaking at 65 MPH
I have had the wheels road force balanced, the suspension tightened and front wheels aligned with no improvement. The shaking seems to be coming from the wheels not the drivetrain (its not vibration)
I have stock wheels and Firestone replica bias ply tires
The tires' sidewalls seem to be misshaped in and out by about 1/4 in. as the rotate them so they appear to wobble as observed driving down the road. NOT the wheels as they are fine. I hope I have described the issue properly. Ed R
Reply With Quote
  #2 (permalink)   IP: 98.127.194.125
Old 07-24-2016, 07:12 PM
 
Join Date: Apr 2015
Posts: 134
Rep Power: 19
HeadacheGuy is on a distinguished road
Garage
I am a mechanic but not a tire guy but I have to chase shake and vibration issues on a weekly basis so bear with me. Shake and vibration are pretty closly related so a little more info may be needed. When it shakes does it change AT all when letting off on the gas pedal instantly or does it stay the same until you reduce it to a lower speed gradually? If it changes when the load is taken off instantly you are chasing a drivetrain problem and not the tires or wheels. Choices here are tight or loose u-joint (one sticking in a plane may not be evident unless you pull the driveshaft and feel it), loose pinion in the differential , or something like a bad rear transmission mount. if your problem is the latter and you have to get rid of the shake by reducing to a lower speed and it gradually goes away you are back to wheel, tire OR unbalanced driveshaft. If you jack the car up you want to spin the tires and look for side to side runout and especially up and down runout . if you have it on a hoist (preferable) run it in drive and watch the rear wheels. The catch here is that a tire can be balanced with runout and tire shops miss this. I have seen customers have tries balanced that where badly cupped and the tire guys never said anything to them. Also do you feel it in the steering wheel? If yes or know it gives you a direction if you are chasing backs or fronts. The important point here is little to no up and down runout. The tire needs to be round. Sighting the tread when spinning will tell you side to side runout. Sorry for the long post but I feel for you. These can be hard to chase.
Reply With Quote
  #3 (permalink)   IP: 66.176.249.39
Old 07-25-2016, 12:41 PM
 
Join Date: Jul 2016
Posts: 24
Rep Power: 0
Ed Raabe is on a distinguished road
Garage
Thanks I will try another test run, but I believe I have tested the Drivetrain using the method you described and discounted it. I took it to the shop and the Mechanic found the front & rear suspension loose! He said he went over everything but could only test drive up to 55mph. This issue starts around 62 and at 67 it is really bad and then smooth out a little over that, but no "fun " to drive.
The tire shop rotated the tries on the rims to reduce the amount of weights on the wheels and told me they are round "true" but I found a 1/4" difference in the sidewall run out when I spin the wheels top to bottom, but the tread seems straight as an arrow! The rims seem OK
3 of the 4 tires look like they wobble going down the road!
Reply With Quote
  #4 (permalink)   IP: 74.102.99.192
Old 07-26-2016, 10:03 PM
 
Join Date: Jun 2011
Posts: 313
Rep Power: 41
paul2748 is on a distinguished road
Can you get another set of tires and rims to make a test on? If it's ok with the test set, then definitely your rims and/or your tires.

Did you check side run-out on the rims? Are they straight?

Is this for a Concours car? if not, I suggest radials if the rims check out.

Last edited by paul2748; 07-26-2016 at 10:05 PM.
Reply With Quote
  #5 (permalink)   IP: 66.176.249.39
Old 07-27-2016, 09:54 AM
 
Join Date: Jul 2016
Posts: 24
Rep Power: 0
Ed Raabe is on a distinguished road
Garage
Thanks Paul that is the next step I can pull the wheels off my Edsel and take a run with those. The wheel was straight but tire tire sidewall was warped. Will keep you up dated. Ed
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -4. The time now is 08:46 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.3.0
Garage vBulletin Plugins by Drive Thru Online, Inc.