Patrol Gearbox noise??

Submitted: Wednesday, Apr 16, 2008 at 19:23
ThreadID: 56703 Views:5809 Replies:5 FollowUps:6
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Hi ya all!! Ive got a rattlle in the gearbox Manual 4.2 deisel,It started after i had the usuall Blown 5 th gear fixed,as well as new clutch. Its at its noisyest when cold ,and when you press the clutch in it stops??? Any help would be appreciated, its been like it for 6 months now!! Just not to keen to travel to far away with it at the moment!! Cheers, Craig
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Reply By: Member - Graham H (QLD) - Wednesday, Apr 16, 2008 at 19:48

Wednesday, Apr 16, 2008 at 19:48
Sounds more like a thrust bearing if it stops when you put the clutch in
AnswerID: 298904

Follow Up By: Trevor R (QLD) - Thursday, Apr 17, 2008 at 08:25

Thursday, Apr 17, 2008 at 08:25
Criag, I tend to agree with Graham here. This should have been sugessted to be changed while the box was out though, in my opinion. $20 bearing but $600 in labour to get to it if box is still attached to motor. Talk to your repairer Craig, as many would have just replaced this part as a standard "service" and included it in your bill. If this is the case you are obviously looking for something else causing the noise.

Happy hunting.
Trevor.
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Reply By: Willem - Wednesday, Apr 16, 2008 at 19:56

Wednesday, Apr 16, 2008 at 19:56
My GQ gearbox does the same.

Had the box out to replace flywheel and clutch and bearings about 3 years ago.

It is not a thrust bearing noise but a full blown rattle when cold. Sounds like there is a rock rolling around inside the box. Been like that for the past year. After while, when everything is warm, it goes quiet. Maybe a Nissan thing...lol. I just ignore it.


Cheers

AnswerID: 298906

Reply By: Waynepd (NSW) - Wednesday, Apr 16, 2008 at 20:47

Wednesday, Apr 16, 2008 at 20:47
I get a similar noise at idle when pushing in and releasing the clutch,
My mech told me to get the bearing done when i get the clutch done, that was four or so years ago still haven't done the clutch hehehehehehe. No ill effects at this stage
AnswerID: 298921

Follow Up By: Member - Borgy.. (SA) - Wednesday, Apr 16, 2008 at 21:10

Wednesday, Apr 16, 2008 at 21:10
G'day Waynepd

I wouldnt be to concerned about it mate, my old GU used to do it as well, i had the box rebuilt and that stopped it for a while , but after that it started again so i was concerned and had the bloody thing checked again by a different gearbox specialist, he told me it was a common thing with the patrol boxes.

Cheers.......Dave
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Follow Up By: Member - Borgy.. (SA) - Wednesday, Apr 16, 2008 at 21:12

Wednesday, Apr 16, 2008 at 21:12
sorry Wayne that reply was actually meant for Craig....

cheers.....Dave
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Follow Up By: Waynepd (NSW) - Wednesday, Apr 16, 2008 at 22:02

Wednesday, Apr 16, 2008 at 22:02
:)
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FollowupID: 565117

Reply By: splits - Wednesday, Apr 16, 2008 at 23:26

Wednesday, Apr 16, 2008 at 23:26
Craig

If this rattle sounds like the way Willem described it then it could be the same noise we used to hear in new 60 series diesel Cruisers when I was working on them years ago. The technical boys at Thiess Toyota, the State distributor for Toyota commercials, called it "roll over" noise and said it was caused by the clearance between the unloaded gears as they spun freely while the engine was idling in neutral. I can't remember it being a problem in petrol cars but it was very noticeable in diesels probably because it was amplified by the normal rattling of a diesel engine.

They said it was normal and would not cause any problems but it was very hard to convince some customers. One particular one would not accept it so Thiess authorised us to replace everything except the input and mainshaft. I rebuilt the box myself taking more care on it than I had ever done before but the noise came back halfway through a short test drive.

I have not worked on cars since those days so I don't know if later Toyotas, Patrols or anything else suffer from it.

There are a lot of things that can cause transmission noises but it is hard to work it out without hearing it.

Does the noise occur only in neutral while idling or can you hear it on the road? Will a slight touch on the clutch pedal stop it or do you have to push it right down? Does holding, moving or trying to lift the gear lever have any affect on it? If you can hear it on the road, does it get worse when slowing down in the lower gears while using engine braking?

It might not be a bad idea if you get two or three different opinions on it. I would not be too keen on getting too far away either until I knew exactly what it is.

Brian
AnswerID: 298955

Follow Up By: Member - craig W (NSW) - Thursday, Apr 17, 2008 at 06:53

Thursday, Apr 17, 2008 at 06:53
Thanks for the input guys,probably not as concerned now,seems its just one of those things!!As willem said it sounds like theres a rock in the box!!My mate did the replacing 5 th gear job,hes a good mechanic has a patrol him self, at first i thought it was a thrust bearing,he got under it and straight away picked it to be coming from the box. Cant seem to hear the noise when on the road and moving! Only 1 things got me stumped now,It never did it untill the box was fixed after the blown 5 th gear??? Thats the weird part??He replaced all bearings & Clutch!! thanks 4 the help all!!! Craig!! I,ll just turn the c.d up higher!!!
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Follow Up By: RosscoH - Thursday, Apr 17, 2008 at 15:25

Thursday, Apr 17, 2008 at 15:25
You sure someone hasn't slipped a RoadRanger in while you weren't looking, that would explain the rattle.
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FollowupID: 565192

Reply By: Keith_A (Qld) - Thursday, Apr 17, 2008 at 09:19

Thursday, Apr 17, 2008 at 09:19
Hi Craig - If all else fails, why not throw some AW10 in (this is also used in Mining and marine industries), from Brid Walker at CEM?
No connection - just a happy customer - but his stuff works.
CEM = Cost Effective Maintenance Web site is costeffective.com.au
Worth just ringing an having a chat............................Keith
AnswerID: 298988

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