Notices
964 Forum 1989-1994
Sponsored by:
Sponsored by:

Vibration at 70 MPH

Thread Tools
 
Search this Thread
 
Old Jul 29, 2008 | 01:15 PM
  #1  
hans57's Avatar
hans57
Thread Starter
Instructor
 
Joined: Oct 2007
Posts: 166
Likes: 1
From: Columbus, Ohio
Default Vibration at 70 MPH

All,

I have a 91 C2 cab and I get a vibration at speeds between 65 and 80 that seems to be coming from the rear. Is it likely to be the tires or are there some other weird things that could be lurking underneath? The tires have plenty of tread, no unusal wear that I can see. Toyo Proxies.........

I am assuming the tires, but want to be armed with alternatives if balancing does not work

Thanks!
Reply
Old Jul 29, 2008 | 02:17 PM
  #2  
Uber 911's Avatar
Uber 911
Registered User
 
Joined: Dec 2007
Posts: 820
Likes: 1
From: Europe
Default

The speed range, 65-80mph certainly points to a wheel or both out of balance..
Reply
Old Jul 29, 2008 | 05:55 PM
  #3  
cwrm4's Avatar
cwrm4
Rennlist Member
20 Year Member
 
Joined: Feb 2006
Posts: 630
Likes: 60
From: Houston, Texas
Default

Had the same issue and rebalancing the tires corrected it. (I think a weight may have fallen off one of them.)
Reply
Old Jul 29, 2008 | 06:11 PM
  #4  
Uber 911's Avatar
Uber 911
Registered User
 
Joined: Dec 2007
Posts: 820
Likes: 1
From: Europe
Default

cwrm4,
don't know if you get Top Gear but if your avatar is anything to go by you'll really appreciate the last of current series.

Apparently in Germany, like many countries they're copying the format... 3 people and fast cars. So to 'meet up' with the presenters of the German equivalent how'd you thing they arrive? In cars? nope, they chip up in.........



Three WWII Spitfires Class!


http://www.bebo.com/PhotoAlbumBig.js...mId=7848987023
Reply
Old Jul 30, 2008 | 09:33 AM
  #5  
andrew911's Avatar
andrew911
Three Wheelin'
 
Joined: Mar 2003
Posts: 1,402
Likes: 1
From: New Jersey
Default

Sounds like wheel balancing (hopefully not bent rim- most likely just balancing)

Other things it could be: Check for proper tire inflation. Also, if the car has been sitting for a while and you noticed it after a short drive it could just be a flat spot working out. Sometimes when a car sits for say a month+ you'll notice a vibration/sound on the highway that typically goes away after 5 minutes or so at highway speeds as the tires warm up and get back to round.
Reply
Old Jul 30, 2008 | 09:48 AM
  #6  
cwrm4's Avatar
cwrm4
Rennlist Member
20 Year Member
 
Joined: Feb 2006
Posts: 630
Likes: 60
From: Houston, Texas
Default

Originally Posted by 964 Tip UK
cwrm4,
don't know if you get Top Gear but if your avatar is anything to go by you'll really appreciate the last of current series.

Apparently in Germany, like many countries they're copying the format... 3 people and fast cars. So to 'meet up' with the presenters of the German equivalent how'd you thing they arrive? In cars? nope, they chip up in.........

Three WWII Spitfires Class!
Thanks! Given the dramatic way in which they film their episodes, I quite look forward to that footage.

I am very much the Top Gear fan, having spent most of the years 1998 to 2004 living/working in various parts of Europe, including 2 years in the UK. Here the BBC America now shows Top Gear, but the schedule is a bit erratic (they are currently showing series 6 and series 8) and they lop a bit off each segment to squeeze in maximum commercials.
Reply
Old Jul 30, 2008 | 11:45 AM
  #7  
hans57's Avatar
hans57
Thread Starter
Instructor
 
Joined: Oct 2007
Posts: 166
Likes: 1
From: Columbus, Ohio
Default

Thanks to all,

I will get them balanced next week.
Reply
Old Jul 30, 2008 | 01:05 PM
  #8  
DAVISRILEY's Avatar
DAVISRILEY
Three Wheelin'
 
Joined: Apr 2004
Posts: 1,433
Likes: 1
From: bloomington, IN
Default

Try and have them balanced by someone who has a Hunter road force balancer or something similar. That way you can get a better idea if it is the tire, wheel, or combo of the both. I have just had better luck that way.
Reply




All times are GMT -3. The time now is 09:36 AM.