Topic: high speed vibration

[Tin Indians Rule]

Homer, You might also have someone follow you and watch your rear wheel. You may have a bent axle.

[HOMER]

i swapped out a diff rearend last summer , didnt fix it i even stole the drive shaft off my dads trans am to try ,four new tires that i balance like four times now , i just always figured i got a bad tire but dont know which one since there all new and they all balanced out fine

[joe d]

most shimmy's over 55 or 60 are in the rear of vehicle

[HOMER]

it goes away at higher speeds

[joe d]

this sounds like the same issue i have had since day one , and still never resolved, my car was nut and bolt restored everything new , i checked everything , balanced everything, swaped out driveshafts even swaped out a new rear end to test ,  viberates around 60-70 , more of a shimmy though

?

[joe d]

it goes away at higher speeds

?

[HOMER]

vibratesd around 60 goes away at like 80

[joe d]

sounds like rear tires/wheels to me

[HOMER]

thats what i thought too , all new though , im thinking about buying new flakes and ditching the rallys  , and getting new tires , even though there already new

[joe d]

before you do that see if a local shop has a roadforce balancer and tell them when it shimmy's a roadforce will balance the tire with the same amount of force as your car ie... 3k pounds or whatever

[Tin Indians Rule]

Homer, One other thought. Take it to a truckstop that installs steer tires. They will have a machine that butts up against the tire while its jacked up and mounted on car. It will spin it at highway speeds and balance everything rotating at the same time. So it will balance the tire, wheel, lug nuts, rotor/drum and if on the rear your axle. It will balance all as a whole anything that spins with that tire. May find your problem. Just remember if you ever have a flat to mark the position so you reinstall tire/wheel in same position.

[joe d]

Homer, One other thought. Take it to a truckstop that installs steer tires. They will have a machine that butts up against the tire while its jacked up and mounted on car. It will spin it at highway speeds and balance everything rotating at the same time. So it will balance the tire, wheel, lug nuts, rotor/drum and if on the rear your axle. It will balance all as a whole anything that spins with that tire. May find your problem. Just remember if you ever have a flat to mark the position so you reinstall tire/wheel in same position.

my god Tin, how old are you? i used to love those balancers, i would rest my chin on the fender with a cigarette in my mouth and when no more vibration it was good LOL

[Tin Indians Rule]

Lets just say it was new technology when I was introduced to it.The horses used to get real pissed if you put the jack in the wrong place,  LOL

[joe d]

LMAO really though the new technology Roadforce is great but expensive and not many shops have one and the techs hate using it as it is time consuming

[HOMER]

yea, theres nothing like that around here ( i live in the sticks lol) when i balanced them i did it with the trim rings on thought maybe that would help but no, usually when a tire is bad you can tell by the amount of weight needed they took a normal amount though