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Vibration at Speed

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by Haydo, Apr 1, 2011.

  1. Haydo

    Haydo Member

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    G'day all,

    I know there's a few posts on this but l'll give it a crack again...

    I'm getting serious vibration over 85km, nothing noticeable at lower speeds.
    I've had the wheels balanced & aligned a couple of times. Last time they were rotated.
    The steering wheel goes nuts shaking from side to side but I reckon I can feel the vibe through the seat & even the accelerator pedal at times too.

    The weird thing is crusin down the freeway 100-120km the steering wheel will be shaking like mad, then all of a sudden it will be as smooth as, no vibe for about a minute or so then it starts going spastic again. This makes me think its something out of the ordinary but maybe I'm wrong.
     
  2. Adds_05

    Adds_05 New Member

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    maybe some bushes need replacing,front castor etc? or wheel bearing?
     
  3. Haydo

    Haydo Member

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    Thanks for the reply Adds.
    I should have mentioned, front caster bushes have been replaced already. As for the bearings they seem tight but while I had the car up I gave the wheels a spin... about once per rev. there is some friction. I would have had a better look if the mrs wasn't breaking my balls... but just by that maybe the rotors are warped? Come to think of it I reckon I can feel it when braking lightly. Whaddya think?
     
  4. calais24/7

    calais24/7 Mucca Mad Boys

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    just an idea mate, get someone else's front wheels to borrow, ones that drive fine on their car and take it for a spin. I had the same problem but mine was constant at 80+ it turned out it was the tires, they wernt low and what i thought were a good brand to. so yeah borrow some other wheels and try that out? saves you buying new tires if it isnt the tires
     
  5. c2105026

    c2105026 Member

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    Check:
    - Bushes
    - Wheel bearings
    - steering rack

    I had a similar issue on the VB. If its VT, the problem could be in the tailshaft. Problem on the VB was solved via a new set of tyres.
     
  6. tdirago

    tdirago New Member

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    Maybe a wheel or two is buckled, if you get the chance have a look at that
     
  7. Mohi

    Mohi New Member

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    mine had the same trouble and then found out one of the wheel was buckled , tell the tyre shop people to only run the wheel on the balancing machine without the tyre and they will find out which one is it.
     
  8. Haydo

    Haydo Member

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    Yeah, I've got a set of VT Clubsport rims in a mate's shed but that's at the arse end of nowhere... looks like I'm goin for a road trip next weekend.

    I miss my old VC... the old interceptor rims would come in handy about now. Besides caster bushes what else should I be looking at?

    They look OK visually anyway, I'll be spewing if they are. I reckon the friction is between the rotor & pad though, would a buckled rim cause that?

    Thanks for the replys fellas. I'll have a better look this weekend.
     
  9. Haydo

    Haydo Member

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    Thanks for the tip mate, I'll be pi$$ed off if its a rim though.
     
  10. tdirago

    tdirago New Member

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    I got my wheels off ciddyau (user of this site) and the two front wheels were badly buckled and i get the vibration at higher speeds, but to combat this they put the wheels at the back and the best two at the front. Had to get two new tires as well as one was deformed and other had a split :(

    to bad he forgot to mention this stuff to me and i had to learn the hardway
     
  11. Jonno

    Jonno :)

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    Hey mate I aggree with everyone about the rim/tyres
    Where u from I could help...
     
  12. calais24/7

    calais24/7 Mucca Mad Boys

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    yeah if your anyone near canberra i can lend you a couple of chasers or wheels or something
     
  13. calais24/7

    calais24/7 Mucca Mad Boys

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    i would have given him a ring if i was you
     
  14. Circlotron

    Circlotron New Member

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    Son's '96 Magna has pretty much identical vibration. We are getting to think it is the shock absorber / damper in the front strut.
    The mass of the wheel and the bounciness of the tyre on the road has a natural frequency and if the rotational speed approaches that frequency and there is no damping to speak of then it is very likely the wheel will hop up and down violently.
     
  15. graham7773

    graham7773 Member

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    If all else fails, check your tie rod ends. Just a little play can do exactly what you have described ie vibration then all gone then back again. I don't know about now but it used to be called "tram tracking". Hit a little bump that would not normally worry the car and get light to mad vibration and maybe even the steering following small ruts in the road. Easy fix though. new tie rod ends are cheap as chips.
     
  16. Rhin0o8

    Rhin0o8 New Member

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    youre right on the money there.

    I replaced my tie-rod ends in my VT just this last Friday.
    I had constant viabration above 90kmp/h

    30 minute job to replace and it drives a hell of alot better
    cost no more than $40 a pair. ALWAYS change both sides at the same time

    OP, check and replace tie-rod ends
     
  17. tdirago

    tdirago New Member

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    he lives less than 5kms away from me, i dropped off the beaurepairs invoice with a description of what was wrong and how much i paid at his house and he still refused to pay a cent. had to pay to get the other tires turned inside out beacuse they had walls lol

    ah well, i was ignorant. not anymore
     
  18. Haydo

    Haydo Member

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    Awesome specific response Graham! How do I give ya some feedback points? Outer tie rod ends look easy enough to replace so I'll give it a crack. I guess I'll need another alignment after I do the job... Thanks for the confimation Rhino.

    Appreciate the offer for help Jonno, I'm prolly about an hour away from you (about the same distance to my mates shed where my other rims are). Do you get extra strokes with a supercharger? LOL... Suck, squeeze, bang, fart... ping! 5 strokes x 6 cylinders=30! LOL

    Still reckon my rotors are warped though... how's this idea for a test?
    I took a piece of chalk (from the Darts scoreboard) & marked the rotors about every CM then pushed the car a couple of metres, really slowly so I didn't use brakes to stop, then had a look. Chalk marks rubbed off on about 1/4 to 1/3 of the rotor. Similar on the other side.
    Could shagged tie rods cause this? I'll change 'em anyway.
    Was the idea stupid?
     
    Last edited: Apr 6, 2011
  19. Haydo

    Haydo Member

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    Hmmm... No comments? Maybe it was a stupid idea then.

    Update:
    Changed the tie rod ends which definately improved the feel of the steering but didn't fix the vibrating at speed. I might be dreaming but it may have actually accentuated the problem. Still, it was worth the $70 spent at Repco. Getting a balance & alignment Monday so we'll see what difference that makes - I'll get 'em to balance the rim withouht the tyre like Mohi suggested.

    Any other ideas fellas?
     
  20. c2105026

    c2105026 Member

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    with the rotors - does the steering wheel shake under vibration at moderate speed eg. going from 80-60? If not then its probably no the rotors. I still reckon it could be they tyres. How much mileage is on your current tyres?
     

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