GU1 Wagon TD42t Rattles

[Muttley]

G'day all,

Hope someone can point me in the right direction. I have a GU1 ST Wagon with TD42T. every time I get under about 1000 rpm I get this horrid rattling sound which seems to come from the whole car...

I've checked bolts, screws, connections all over but cannot figure it out.

it's had a single mass fly wheel installed with the new clutch... and I can't pinpoint it's source...

Frustrated...

[nissannewby]

Is it a rattle or more of a growl?

[Muttley]

Is it a rattle or more of a growl?

yes, probably best described as a growl...

[Cuppa]

Normal ...... they all do it.

[nissannewby]

Yeah without hearing it and by what you have described they all make it. Its hard to be 100% without hearing it.

[Muttley]

Normal ...... they all do it.

but it's quite loud - my GU1 2.8TD never did it, ever...

[Cuppa]

but it's quite loud - my GU1 2.8TD never did it, ever...

Bearing in mind what NN said about not being 100% certain without hearing it, the 4.2's do have what some describe as a 'growling' and what I would describe as a 'loud shuddering' when under load at low revs, disappears as soon as the revs rise. When I was buying mine an RACV pre purchase test paid for by the car yard reckoned there was something wrong with the gearbox. A second inspection by a 4wd transmission specialist pronounced it in good condition & the noise normal. I used to find it quite irritating but have grown accustomed to it. 'Nissan character'! :)

Cuppa

[batesy]

why would you be driving it under 1000rpm to much labouring.

[Muttley]

why would you be driving it under 1000rpm to much labouring.

over speed bumps, through parking lots etc..

[surgio]

Yea mine does it too, I'm still not convinced mine is normal! First cars ive owned that has made this noise! But yea, disappears when revs get to about 1100 - 1200 rpm

[Dam355]

All the 4.2's do it.

[happygu]

The 4.2's have a harmonic frequency vibration through the driveline at low revs - never used to worry me too much, but haven't had a 4.2 for a long time and you sort of forget what it is like....

Mic

[Wizard52]

Agree with previous comments. All manuals do it even from new (not as loud of course). The service manager at Nissan Caboolture- bloody good and very knowledgeable bloke on 4.2 diesels told me about the growl in the box when I bought my new ute in 2006. He also said it would get worse with age- and he was right. I think he said it was the way the gears were cut and as they are so strong and reliable, I for one, am prepared to put up with it. My son's GQ ute with a lot more klm's is the same.

Only happens at slow speed usually in 1st when crawling at under 1000 rpm and disappears quickly.

[Cuppa]

Just out of interest, does anyone know if the 'growl' is audible outside the vehicle? Can't say I ever noticed it on another Patrol.

Cuppa

[happygu]

Not as noticeable from the outside, as it is often masked by tyre noise, as well as engine noise.