A whole lotta shakin' goin on

[BOBA]

Well, since I got my truck I've had problems with vibration at high speeds, I thought it was merely old rotted and flat spotted tires, but after getting new tires, balancing(twice - knocked a weight off somehow) and an alignment I am still getting vibration at high speeds. Feels like an out-of-balance shake as it gets up to about 70-75, after getting up to about 85-90, it goes away, but as soon as I slow down it shakes all the way down to 60, and pretty much requires a nearly complete stop to make it go away.

This one can't be that complicated! I mean, I thought this would be easy after messing with my low boost(I think I finally got it, still slow but hits full and hard).

 

[Sy370]

Re: A whole lotta shakin' goin on

Maybe brakes?
________
VAPOR TOWER VAPORIZER

 

[Syclone#1992]

Re: A whole lotta shakin' goin on

Make sure your rims aren't bent.... I had a slight vibration when I first got my truck, had the the upper balljoints replaced and had it aligned, the problem went away. Check your balljoints, upper and lower by jacking up the truck, moving the wheel with your hand side to side, and up and down. If you have a LOT of movement, its not good.. Did the old tires have any weird wearing patterns? Make sure it was aligned using the Typhoon specs too....

 

[QUICK STORM]

Re: A whole lotta shakin' goin on

Make sure your rims aren't bent.... I had a slight vibration when I first got my truck, had the the upper balljoints replaced and had it aligned, the problem went away. Check your balljoints, upper and lower by jacking up the truck, moving the wheel with your hand side to side, and up and down. If you have a LOT of movement, its not good.. Did the old tires have any weird wearing patterns? Make sure it was aligned using the Typhoon specs too....

i agree with tim. sounds to me like more suspension issues i.e. balljoints, bushings etc....

about the wheels being bent....see if you can find a local tire shop with a wheel balancer that puts a simulated load on the rotating assembly to find imperfections in the wheels and tires, many times you may have to spin the tire 180* on the wheel to achieve good match balancing, meaning matching low spot on the wheel to the high spot of the tire and vice versa.

 

[Flyin Ryan]

Re: A whole lotta shakin' goin on

Propshaft out of balance has caused this for me in the past.. remove the propshaft and drive around alittle bit to cancel that out from being one the possiblities.

 

[BOBA]

Re: A whole lotta shakin' goin on

Thanks for the info. Really leaning toward the balljoints/bushings, I'll check that out(as soon as my dad gives me back my hydraulic jack). I've ruled out the rims, I have a bend in the lip on one of them and had them checked to make sure they were fine as one of the first things done to the truck.

As for the propshaft, wouldn't it have a constant vibration? if it is out of balance, does it need to be replaced or modified? Don't really like the idea of driving at high speeds missing parts.

 

[SEL777]

Re: A whole lotta shakin' goin on

Looks like my ideas have been covered. The propshaft, rims and alignment would be the place to start.

 

[Flyin Ryan]

Re: A whole lotta shakin' goin on

As for the propshaft, wouldn't it have a constant vibration? if it is out of balance, does it need to be replaced or modified? Don't really like the idea of driving at high speeds missing parts.

When mine was out of balance it did vibrate at certain speeds.. one other time when it was unbalanced it only did the vibration thing for a few miles at all different speeds then snaped and took out my range selector and such so just to be safe. I'd take it out and drive the truck around a little bit at different speeds.

You can drive at any speed without the front propshaft installed.. you'll just be 2wd like a normal s10 or sonoma. I drove around for six months like that just becareful with the pedle you'll cook your rear wheels up quick. Oh and im not telling you to take it out for a long period of time just so you can rule that out of the possibilities.. because ball joints are some cash to replace if they've never been done before. IF you do them yourselve they are a major PITA as you have to drill out each rivet.

 

[BLACK92TY]

Re: A whole lotta shakin' goin on

I would also suggest changing your cv shafts. I just changed mine recently and my high speed vibrations were eliminated.

 

[live1053rulz]

Re: A whole lotta shakin' goin on

can you feel where the vibraton is coming from? front or rear? also, is your truck lowered? if its lowered more that about 2" you might run into some u-joint issues which could cause vibraton. although your tires and wheels are probably balanced just fine, id suggest finding someone with a new balancer like the one made by Hunter. thats what we use in our shop. state of the art. be sure they balance them testing the Road Force Variation. this only found on newer machines and is another way to forsee vabration issues.

 

[NOJIMMY]

Re: A whole lotta shakin' goin on

...you dont mention mileage, wheel condition (after market or stock), tires (type of balancing)
ride height or such, but inadditon to the above responses:

1.If you have wheel adapters, look at these again.
2.If you have aftermarket wheels, are they hub centering vs lug centering.
3.With new/rebalanced tires, were they properly done (with min weight additions)
4.Are wheels bent or damaged (can you put another set on to check)
5.Is the vibration sensed in the steering wheel, floor, or seat (to determine if
its front or rear related)
6.Is it speed, rpm, gear, acceleration/braking or track surface related
7.Is your transmission cross member damaged
8.Is your vehicle lowered extremely, and is bushings, dampners, shocks, etc okay
9.Does vibration differ if TC is locked/unlocked
10. And how are your suspension, driveline, and brake components?

 

[live1053rulz]

Re: A whole lotta shakin' goin on

all valid points ^^^

 

[dalwine250]

Re: A whole lotta shakin' goin on

dont forget wheel bearings while your doing the ball joints,sytys are hard on em. dave

 

[InvisiBill]

Re: A whole lotta shakin' goin on

Speaking from experience, worn bearings in the front diff can cause the flange and propshaft to wobble, causing vibration. So it would be the propshaft that's spinning out of round, but the propshaft itself isn't actually the problem.

 

[BOBA]

Re: A whole lotta shakin' goin on

I guess I have a few things to look at this weekend(nice checklist NO JIMMY).

What I can say, wheels are stock, stock height, made sure the wheels were balanced properly, I'll have to check on the wear on many of the listed components, but if memory serves they weren't overly gummed up or had any noticable defects(that may or may not have changed).

But the vibration is definately in the front, mostly in the steering wheel, possibly under the front seats(once it really starts shaking, the whole cabin vibrates). This only occurs at high speeds, with nothing at differing rpms, gear, ect.

Mileage is a hair below 30k, many things that could be dry rotted – were. Don't think it was ever cared for properly, so it seems I'm fixing alot that the previous owner ignored.

Hope this info helps... should have more info on the parts this weekend after I jack it up.