tire/brake help
#1
tire/brake help
My 99 4runner has lots of vibration, almost thumping, when I brake moderately (going downhill, etc..). I took it into the shop and they said the brakes are fine - almost new. The only problem he found was my right rear tire was way out of round. So questions:
1. What's causing the vibration/thumping I feel in the steering wheel? can't be a rear tire, right?
2. The tire that's out of round is only 6 months old. Do I have to scrap it? What problems could I encounter if I don't change it out? (And what exactly is "out of round"? - is the rubber giving in one area?)
OK, more than two questions...
thanks!
Kurt
1. What's causing the vibration/thumping I feel in the steering wheel? can't be a rear tire, right?
2. The tire that's out of round is only 6 months old. Do I have to scrap it? What problems could I encounter if I don't change it out? (And what exactly is "out of round"? - is the rubber giving in one area?)
OK, more than two questions...
thanks!
Kurt
#2
Contributing Member
Originally Posted by callmekurt
My 99 4runner has lots of vibration, almost thumping, when I brake moderately (going downhill, etc..). I took it into the shop and they said the brakes are fine - almost new. The only problem he found was my right rear tire was way out of round. So questions:
1. What's causing the vibration/thumping I feel in the steering wheel? can't be a rear tire, right?
If you only feel the vibration when braking, it is likely that your rotors (or drums) are warped and may need replacement.
2. The tire that's out of round is only 6 months old. Do I have to scrap it? What problems could I encounter if I don't change it out? (And what exactly is "out of round"? - is the rubber giving in one area?)
Sometimes a tire does need to be scrapped but certainly not always and more often than not, a road force balance will smooth out the condition enough to be tolerable.
1. What's causing the vibration/thumping I feel in the steering wheel? can't be a rear tire, right?
If you only feel the vibration when braking, it is likely that your rotors (or drums) are warped and may need replacement.
2. The tire that's out of round is only 6 months old. Do I have to scrap it? What problems could I encounter if I don't change it out? (And what exactly is "out of round"? - is the rubber giving in one area?)
Sometimes a tire does need to be scrapped but certainly not always and more often than not, a road force balance will smooth out the condition enough to be tolerable.
http://www.gsp9700.com/pub/features/intro.cfm
#4
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I agree the thumbing while braking is probably because your rotors are warped (while your brake pads are fine). It happened to several 3rd gen owners on this board, me included. I replaced my front rotors with brembo rotors and it removed the problem. Don't get the old rotors turned, new OEM are only a little more and will last longer.
#5
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Originally Posted by callmekurt
Thanks for the link. What's a road force balance?
Kurt
Kurt
#6
What about vibrations at high speeds (60-70 mph) in the steering wheel? That's another symptom....
Should I just scrap these tires?? (Goodyear Wrangler RT/S)
New rotors and new tires?
Should I just scrap these tires?? (Goodyear Wrangler RT/S)
New rotors and new tires?
#7
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That sounds like balancing issue. The wheels are lug centric so make sure the place you get them balanced at has the proper adaptor (do a search for adaptor I think it is called Haweka) or go to a Toyota mechanic/dealer. Do you have any warranty on the tires?
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#8
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I assume the 3rd Gen has a wimpy steering stabilizer shock... the 2nd Gens have really a really wimpy stock part. If that's bad, you'll have vibrations when you brake and when you don't.
However, just adding a stiffer shock to cover up the vibrations caused by bad rotors or balancing would not be a good idea.
However, just adding a stiffer shock to cover up the vibrations caused by bad rotors or balancing would not be a good idea.
#9
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I don't think the 3rd gen has a steering stabilizer
https://www.yotatech.com/forums/show...ilizer+3rd+gen
https://www.yotatech.com/forums/show...ilizer+3rd+gen
#11
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Originally Posted by Roadtripr
I don't think the 3rd gen has a steering stabilizer
https://www.yotatech.com/forums/show...ilizer+3rd+gen
https://www.yotatech.com/forums/show...ilizer+3rd+gen
(contrary to my previous post,)
so yah! Slap a stabilizer on there anyway, that will cover up all the shimmy
#12
thanks for the input -I think I'm gonna take it to our Toy mech. and let them diagnose if it's balancing or alignment (or rotors) or what...not looking fwd to that bill, though.
thanks,
Kurt
thanks,
Kurt