patrol vibration

Submitted: Sunday, Jan 03, 2010 at 12:49

ThreadID: 74840 Views:3916 Replies:8 FollowUps:7

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flanno

G'day guy's
I have a 2000 GU patrol and it has a vibration at 80-90ks. It feels like a wheel out of balance but I've had wheels rebalanced several times and also had another set of wheels on the truck to no avail. So far spent $1000 chasing this problem changing shocks,steering damper,panhard rod bushes,brake disc's checked.The vibration seems to travel though the rest of the truck as well as the steering.Any body with some idea's on what this could be would certainly be appreciated.
cheers
Flanno

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Reply By: Member - Ian H (NSW) - Sunday, Jan 03, 2010 at 13:18

Sunday, Jan 03, 2010 at 13:18

This problem has been reported several times before so a search may help.

AnswerID: 397433

Reply By: iamian - Sunday, Jan 03, 2010 at 13:28

Sunday, Jan 03, 2010 at 13:28

G'day, I've had 3 Patrols and every one of them has had a vibration betwen 90-95km/hr once they've got a few Km's on them (usually started at about 50000km). OK before and after that speed. I'm in Brisbane and the only place that was able to fix the problem was Fourby's 4WD Centre in Moorooka. I have no affiliation with this mob, but they did a good job! They are well aware of this Nissan 'no added cost' feature and have a you-beaut wheel balancing machine. If you're not in Brisbane, you could ring them and ask them for suggestions/recommendations.
Safe travelling,
Ian

AnswerID: 397437

Follow Up By: iamian - Sunday, Jan 03, 2010 at 13:40

Sunday, Jan 03, 2010 at 13:40

Add-on!! I'm pretty sure Fourby's have an on-car wheel balancer...that fixed the prob!

FollowupID: 666273

Reply By: mechpete - Sunday, Jan 03, 2010 at 13:31

Sunday, Jan 03, 2010 at 13:31

gooday flanno
my GQ had the same thing . did all the things you mentioned no good .
when I tightened up the front swivel head bearings , took the shims out .
no more vibration .
mechpete

AnswerID: 397438

Follow Up By: Member - mazcan - Sunday, Jan 03, 2010 at 14:29

Sunday, Jan 03, 2010 at 14:29

hi
swivel head bearings at the top of the front suspension??
thats interesting
as my first guess was trans shaft universals or center carrier bearings as well as wheel sout of balance
just for the record i had a set of tyres retreaded by michelin once and after 3 different tyre dealers tryed to balance them to no avail i traded them in
i will never have tyres retreaded again they vibrated like square wheels
cheers

FollowupID: 666278

Follow Up By: flanno - Tuesday, Jan 05, 2010 at 09:10

Tuesday, Jan 05, 2010 at 09:10

Hey Mechpete
Took your advice and tightened up the swivel head bearings and it feels like a different truck. Still has a small amount of vibration but is heaps better. Wondering if i should do the bottom as well. Thanks for the good advice.

Cheers Flanno

FollowupID: 666580

Follow Up By: mechpete - Wednesday, Jan 06, 2010 at 23:08

Wednesday, Jan 06, 2010 at 23:08

hey flanno .
a bitof trouble with the computer . anyhow take shims out of the lower brgs
as well it should fix it .
let me know how it goes
cheers mechpete

FollowupID: 666838

Reply By: Member - Graham H (QLD) - Sunday, Jan 03, 2010 at 13:36

Sunday, Jan 03, 2010 at 13:36

Driveshaft universals???????????????????????????????

AnswerID: 397439

Reply By: Member - Ed. C. (QLD) - Sunday, Jan 03, 2010 at 14:29

Sunday, Jan 03, 2010 at 14:29

If not already done, check your wheel bearings, they should have no play in them whatsoever...

:)

Confucius say.....
"He who lie underneath automobile with tool in hand,
....Not necessarily mechanic!!"

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AnswerID: 397443

Reply By: Michael ( Moss Vale NSW) - Sunday, Jan 03, 2010 at 18:01

Sunday, Jan 03, 2010 at 18:01

Flanno!! Get in line!! I have the same problem. The main speed is about 85ks but it can be really bad at any time between 80 and 100.. Yes wheel balance and alignent has cost me a small fortune.. One thing I did do was remove the rear tailshaft flange from the rear diff and found a tight uni joint but no free play so i will replace both front and back next week.. I just replaced the steering damper last week and threw the original in the bin... The problem is the vibration changes in that 80 to 100 speed range, it seems sometimes to change with road type(all sealed roads) and condition also.. Michael

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AnswerID: 397465

Reply By: Member - Duncs - Sunday, Jan 03, 2010 at 20:26

Sunday, Jan 03, 2010 at 20:26

Question.

If you turn sharp left while the vibration is happening does it go away for a while? Or does it lessen in left hand bends?

If the answer to any of these questions is Yes then you should check and probably replace the Panhard rod bushes.

I spent over $2000 chasing that vibration, each of the things that have been suggested were looked at and seemed to fix the problem, for a while.

Eventually I spent $50 on new panhard rod bushes and the problem disappeared forever.

Maybe you could save yourself the $2000.

Duncs

AnswerID: 397497

Follow Up By: Michael ( Moss Vale NSW) - Sunday, Jan 03, 2010 at 22:25

Sunday, Jan 03, 2010 at 22:25

Gday Duncs!! Did the bushes actually look like they needed replacing?? Damaged or out of centre?? regards Michael

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FollowupID: 666366

Follow Up By: Member - Duncs - Sunday, Jan 03, 2010 at 22:37

Sunday, Jan 03, 2010 at 22:37

No they didn't.

I had numerous people look at it, suspension specialists, steering specialists, 4wd experts you name it none of them picked the bushes.

Eventually a general mechanic in Nyngan was looking at it, I stopped because it was undriveable. He jacked it up under the chasis and then started pulling and pushing on things. He wasn't even sure how much movement should be there but thought there was too much.

His comment was basically "I can't see anything else that must be it." He did not have the parts to fix it so I struggled on to Dubbo and had the bushes replaced by Pedders. $50 supply and fit.

Duncs

FollowupID: 666369

Follow Up By: Michael ( Moss Vale NSW) - Sunday, Jan 03, 2010 at 22:51

Sunday, Jan 03, 2010 at 22:51

Thanks for that, I will do the universal joints first( i have them already) and then the bushes if the universals dont fix the problem. My 2003 has 290,000ks on it so its likely to be the bushes.. regards Michael

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FollowupID: 666373