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post #1 of (permalink) Old 03-03-2001, 08:43 AM
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vibration headaches

Just got some new BFG allterrain 30-9.50s for my '99 Blazer 2dr 4x4. Rides nice up to 65, then you get a vibration coming from the rear. Had the tires balanced and rebalanced, even had one replaced that possibly could have been off. Finally give up and switch to some uniroyal ATs the same size. Same vibration around 65 and up. Anybody out there had similar problems or have an idea of what it could be?

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post #2 of (permalink) Old 03-03-2001, 09:12 AM
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Re: vibration headaches

Try doing a 4 wheel alinement(sp?). That might be your problem. Or it could be like mine where its just not safe to take it over 75 and i have a set of 31x10.5 BFG A/Ts. Hope this helps.

MudderS10s
91 S-10 4.3L, 5 speed, 3 inch bodylift, 32" super swapper TSLs, 2 inch rear shackle lift
73 CJ-5 mods- way too many to list
post #3 of (permalink) Old 03-03-2001, 12:08 PM
 
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Re: vibration headaches

With that size tire it really isn't "Safe" to go over 60. BUT, I can attest those tires do work well over 100 mph. [img]/wwwthreads_images/icons/laugh.gif[/img]

If the vibration is independent of the type of tire you use, I would look more into the rim, and then look at your driveshaft! A lot of vibration "seems" to be coming from the rear end but it might actually be from somewhere before that. The vibration can move to the rear, where you think it is. Something to think about.

Just to be sure I would check the u-joints and the drive shaft balance.

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post #4 of (permalink) Old 03-03-2001, 06:01 PM
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Re: vibration headaches

check out my reply on s-104x4.com

88 S-10 Blazer 4.3l 2" body, torsion bar/shackle lift, 30" muds, custom front/rear bumpers, 4 KC daylighters, 3.73 Gears
post #5 of (permalink) Old 03-03-2001, 06:15 PM
 
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Re: vibration headaches

<font face="Comic Sans MS">What kind of vibration is it? Is it a low frequency (low rumble, relatively slow shaking type) or higher frequency? What gear are you in when it's vibrating? Try a lower gear if possible at those speeds and see if it still does it. </font>

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post #6 of (permalink) Old 03-04-2001, 05:45 PM
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Re: vibration headaches

Bent rim? mud stuck in the rim? i dont think so cause the mecahnics might would have noticed it while balancing the tires, but it could happen.

post #7 of (permalink) Old 03-07-2001, 11:46 PM
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Re: vibration headaches

what kind of blalnce did you get? For tires that size you should get the vibration ballanced. I have balanced that size of tire before and the thing shook like mad... i rebalanced it 4 times, eah time putting the weight in diff places, I got so furstrated that i duck taped a 2x4 on the sucker AFTER it said it was balanced, and spun it up again, it said "In Tolerence" meaning it was balanced... It may cost you a few bucks extra, but you can go really fast after that.

Tim

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post #8 of (permalink) Old 03-08-2001, 12:18 PM
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Re: vibration headaches

How about your drive shaft? could that be unbalanced?

I`d rather push a Chev than drive a Ford
Hachey, 88 Blazer 4x4
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