car vibrating (shaking) at 80-100km.

[c01799999]

Hi

I have 07 mazda 3 hatchback GT,

I just had AOTELI Set of 4 205/50R17 93W P607 tires from kijiji.

personally, I really liked it the way it looks tire tread and rubber (very soft) also very quiet.

but on highway, I found the car has little shaking or vibration underneath around 80-100km.

when the car is over 100km like 130-40km, It is ok, no more worse vibrations.

only 80-100km has vibrations i can feel.

I went my friend's shop to do balancing.

they found the tire shop where I bought the tires, they did pre bad balancing.

so, my my friend's shop made it ZERO balancing, which looks great.

another day on highway, I definitely can feel less vibrate than last time, but somehow still there, sometimes get worse, sometime not too bad.

next day, I went to aliment, after that, it seems nothing improve.


here is points.

1. Balancing done
2. aliment done

but still shaking.

is it Tires problem? (because chinese cheap brand? )

or any thought?

[XTOTHEL]

You sure it isn't the road?

[silverstarmazda]

what wheels are you running?? if its not oem and the center bore isnt perfect, the wheels could be off center. to correct this you need to get hub rings

[jeffjones]

If you think it is the wheels, Get a roadforce balancing done. It will check the tire and rim for any defects as well.

I had the same problem and had the roadforce done and found I had 2 out of round tires, Changed them and the vibration is pretty much completely gone.

[jeffjones]

Or check your motor mounts

[c01799999]

wheel is 17inch OEM

roadforce balancing was done (2nd time in my friend shop) .

One of wheel was pre bad balancing like 1.00 and 1.25 something like that but my friend balanced in 0

I drove on 401 highway most time in daily.

before installing new tires, it wasn't shaking like that, there are noise because tires worn out so much.

I will try it roadforce balancing one more time. we will see.

Thanks you guys ,

[jeffjones]

Check your Number 3 and 4 motor mounts.
There is a TSB from Mazda saying when they fail they will cause vibration around the 55mph range.

The TSB is 03-003/10

[greffer31]

Since you got the tires on Kijiji they might not have even wearing, if the tires are warped at all you might experience a "hopping" feel

[silverstarmazda]

tires are directional. are they all rotating the right way?

[Cab0oze]

Do you have any suspensions noises? Low speed clunks for example?

[thefish]

Not sure how new the tires are, but if any of them were plugged they could be warped.

[Cab0oze]

Not sure how new the tires are, but if any of them were plugged they could be warped.huh? How could a plugged tire be warped.... unless you knowingly drove on a flat tire for a long time

[c01799999]

I found something new,

I think CV axle is bad, when i drive and reverse or reverse and drive, there are clicking sounds(something breaking sound),

does bad CV axle possibly cause vibrating(shaking) at any speeds? It seems shaking even on 40-60km but not so much i can feel.

another one is engine mount, I tried rev around 2000rpm in parking mode, I could definitely feel vibrating. I think tires are ok.

Let me try fix these things first, and then i will update it.

Thanks guys.

[greffer31]

this is what I was told on a similar thread of my own by MazdaMike02...

"Another possibility is a CV shaft. May have been fine at stock height, and now with lowering springs the shafts have to operate at a different angle which may not be optimal. It might be that one the shafts have just gone bad causing a vibration. This type of vibration (unless really bad) only occurs around highway speeds (100-120)."

[Lumberjack]

Incorrect tire direction will not affect balancing. It only affects tires ability to disperse water or snow in tread.


tires are directional. are they all rotating the right way?

[Lumberjack]

If your car wasn't vibrating before changing tires then it is not your CV joint... I would check the centering of your rims on the hub as they are not OEM or hubcentric. Centering rings will probably help. Your CV joint is priority.


I found something new,

I think CV axle is bad, when i drive and reverse or reverse and drive, there are clicking sounds(something breaking sound),

does bad CV axle possibly cause vibrating(shaking) at any speeds? It seems shaking even on 40-60km but not so much i can feel.

another one is engine mount, I tried rev around 2000rpm in parking mode, I could definitely feel vibrating. I think tires are ok.

Let me try fix these things first, and then i will update it.

Thanks guys.