pajero nm vibration

Submitted: Thursday, Apr 29, 2004 at 22:47
ThreadID: 12493 Views:4304 Replies:5 FollowUps:3
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hello folks

around two months ago, my pajero nm started making some annoying vibrations when running at around 20-30km/h (crawling in traffic). mitsubishi advised it's a combination of yoko a/t tires and stiffer/raised (60mm) suspension, but i've had this combination for more than 12 months. i keep tire pressures around 34psi when on the blacktop.

once i get to around 40km/h the vibration disappears.

any similar experience from anyone. any help is very much appreciated.

froilan
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Reply By: IT Doctor - Thursday, Apr 29, 2004 at 23:41

Thursday, Apr 29, 2004 at 23:41
Froilan

Does this happen when the tyres are cold or all the time? How worn are the tyres? Have you been filling deflating and inflating them a lot, had a emergency stop where you have locked up the brakes? A big bang on the drive shaft (rocks etc). Had the tyres balanced lately? Need more specific info surrounding the lead up to the vibrations.

Hope I have given you a few tips.

Paul
AnswerID: 56653

Reply By: Froilan - Friday, Apr 30, 2004 at 08:59

Friday, Apr 30, 2004 at 08:59
Hello IT Doctor

Vibration happens with either hot or cold tyres. My yokos still have around 60%tread and I drive the paj as a truck not a car, so always make sure I have plenty of braking distance.

I've done some serious trail work around the wollemi region lately but never scraped or banged the body thanks to the suspension lift. I haven't considered the tyre balance, maybe that's the reason. I'm due for a 60K service soon and will get it looked at then.

Thanks heaps for the ideas.

Froilan
AnswerID: 56674

Follow Up By: Rosscoe - Friday, Apr 30, 2004 at 09:43

Friday, Apr 30, 2004 at 09:43
I would think it wouldn't be balance at the low speed you mention.
When you get the tyres checked ask for them to check for out-of-round tyre(s) and for flat spot(s).
Do you feel the vibration through the steering wheel or throught the body of the car/truck?
Do you feel the vibration at all throught the brake pedal?
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FollowupID: 318417

Follow Up By: Froilan - Friday, Apr 30, 2004 at 20:15

Friday, Apr 30, 2004 at 20:15
Hi Roscoe

Vibration is mainly the brake pedal and handbrake. I checked the tyres but can't see any flat spots. tyre is wearing fairly evenly.

Froilan
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FollowupID: 318520

Follow Up By: Rosscoe - Monday, May 03, 2004 at 09:48

Monday, May 03, 2004 at 09:48
Get the brake discs checked. They may need machining. Common problem with some of the current crop of pads. A couple of years ago the use of asbestos was banned and since then there have been some less than good pads around resulting in problems with discs.
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FollowupID: 318750

Reply By: Dingodell - Friday, Apr 30, 2004 at 11:31

Friday, Apr 30, 2004 at 11:31
Frolian you maybe should check the drive uni joints as it is not advisable to have a suspension lift of more than 50mm, that is if you have independent suspension all around, you have not indicated what model you are running. eg pre 2000 or later.
AnswerID: 56694

Reply By: Dingodell - Friday, Apr 30, 2004 at 11:39

Friday, Apr 30, 2004 at 11:39
Sorry Froilan you did mention the model NM. They look very good lifted to 60mm or more but not advisable.

Peter
AnswerID: 56696

Reply By: Eric Experience. - Friday, Apr 30, 2004 at 22:49

Friday, Apr 30, 2004 at 22:49
Froilan.
Sounds like a delaminating tyre, if you jack up each wheel so that it has only 1 mm clearance from the ground and then turn it by hand you will find the lump. as mentioned above a lift that high is not a good or safe idea. Eric.
AnswerID: 56795

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