Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

 

Thread: Tire bump
          
   
   

Reply To Thread
Results 1 to 8 of 8
  1. #1
    rdobbs is offline CHR Member Visit my Photo Gallery
    Join Date
    Feb 2007
    Location
    springfield
    Posts
    383

    Tire bump

     



    Just put on a new set of Goodyear tires on my 94 ford trk. At
    30 to 40 MPH I get a small bump in tires. Took back to dealer
    they re-balanced tires and drove it. Said I might have a drive
    line problem. Called a Transmission shop, ask about driveshaft
    and they say if it were out of balance it would vibrate all time.
    I can take my hands and shake both back tires and I feel some
    slack. Don't have this in front. Was wondering if I could have
    something possibly loose or maybe bad bearings. No noise, and
    no broken springs. Transmission is overdrive, and it bumps in
    or out of overdrive and also in newtrel. Any suggestions would
    be appreciated..

  2. #2
    cffisher's Avatar
    cffisher is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2006
    Location
    Constantine
    Car Year, Make, Model: 57 chevy 2 dr wagon
    Posts
    9,476

    You shouldn't be able to move either rear wheels. Maybe axel bearings. I'd pull the wheels and see whats moveing and go from there
    Charlie
    Lovin' what I do and doing what I love
    Some guys can fix broken NO ONE can fix STUPID
    W8AMR
    http://fishertrains94.webs.com/
    Christian in training

  3. #3
    pro70z28's Avatar
    pro70z28 is offline CHR Member Visit my Photo Gallery
    Join Date
    Aug 2003
    Location
    CC
    Car Year, Make, Model: 70 Camaro Z-28 Now/40 Chevy Back Then
    Posts
    4,306

    If it wasn't doing it before the new tires I would look at the tires a little closer. Could be something other than balance. If you can find another set of tires/wheels to replace them & the problem goes away................that would tell you for sure.
    "PLAN" your life like you will live to 120.
    "LIVE" your life like you could die tomorrow.

    John 3:16
    >>>>>>

  4. #4
    rspears's Avatar
    rspears is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Sep 2007
    Location
    Gardner, KS
    Car Year, Make, Model: '33 HiBoy Coupe, '32 HiBoy Roadster
    Posts
    11,124

    Quote Originally Posted by rdobbs View Post
    I can take my hands and shake both back tires and I feel some
    slack. Don't have this in front. Was wondering if I could have
    something possibly loose or maybe bad bearings.
    What do you mean by "...take my hands and shake both back tires..."? Is the "slack" in & out, pushing & pulling away from the differential or do you mean pulling left, pushing right and reversing that motion? Pro70z28's idea of a borrowing a set of tires from another truck is a good one, and cannot be argued by the tire store if the "bump" comes back with the new tires. Another thought is to put a dial indicator on them, check the runout of the tires, the edge of the rims, and then the axles/rotors. How about your u-joints? They sometimes shake at a harmonic until they get really bad.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  5. #5
    sfort's Avatar
    sfort is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2009
    Location
    Allen
    Car Year, Make, Model: 46 Chevy Truck
    Posts
    528

    Is this bump happening when you drive over a pot hole or bump in the road or do you think it is in relationship to tire rotation. How old are your shocks. Check the shock mounts. What is the tire wall rating (ply) vs what you had on the truck. Do you have a spare? Use it a tire at a time if you cant find a loaner set.

  6. #6
    IC2
    IC2 is offline CHR Member Visit my Photo Gallery
    Join Date
    Sep 2007
    Location
    UPSTATE New York
    Posts
    4,336

    Don't know what size Ford you have, but many later F250/350 4x4 models have a rear axle bump/vibration/etc at 40 to 50 mph. I had a minor one with the original Continentals at 48-50mph on my F350. With the new Kumho's it's even worse and they have been balanced twice on different machines. The vibration is at 49-52 now - whoopee, it moved up a mph. Supposedly a Hunter Road Force balance machine will fix it, but not always plus it's $25-40 a tire if you can even find a place to do them. Go to Ford Truck Enthusiasts Forums - Ford truck and SUV owners and enthusiasts Community And Information Source. and plug it in and you should have many search hits. Welcome to the world of fanny massaging via FoMoCo
    Dave W
    I am now gone from this forum for now - finally have pulled the plug

  7. #7
    rdobbs is offline CHR Member Visit my Photo Gallery
    Join Date
    Feb 2007
    Location
    springfield
    Posts
    383

    Trk is f150 2wd. Old tires were also out of balance. New tires are 15"
    P235 Goodyear Wranglers 2 ply. The motion is back and forth from drive
    shaft. Sounds like axle problems. Dont know how old shocks are. Trk has
    103,000 miles..Thanks for all the good suggestions.

  8. #8
    Bigbzc's Avatar
    Bigbzc is offline CHR Member Visit my Photo Gallery
    Join Date
    Apr 2011
    Location
    Simpsonville
    Car Year, Make, Model: 1978 Chevy K5 Blazer
    Posts
    82

    you should take it to a shop that has a balancer that measures "road Force" of the tires. Knowing what that measurement is will tell you wether it's the tires or not. Any thing over about 30lbs of road force will cause a vibration and the tire will need to be replaced

Reply To Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink