GU transmission growl

Yep , normal, i'm not an expert but i think its the chain drive in the transfer case. Both our 4,2s do the same thing. When they are new there is no noise but gradually gets more noticable as the kilometres go on....

YEP mine does the same, always has. All that grunt just waiting to be unleashed :d

Haven't heard the noise, but every single TD42 mated to that big 5 speed box has the Nissan Growl that it does at low rpms...well not so much a growl, but definitely a noise!

Mine has done it since new, I have also heard some trucks doing it.

The noise comes from a certain vibration of that particular engine at low RPM, the vibration gets passed through the clutch into the gearbox which rattles as a result, I am told that when you change the clutch to a heavy duty one (with heavier springs) the noise is then not as noticeable.

It is not the chain (as someone posted) because with the hubs disenganged and in two wheel drive the chain is not spinning.

The noise comes from the manual gearbox, automatic models (on GQs) with the same engine do not do it.

William

Growly, rattly noise in mine too. has done so from way back. 210K Kms. now and has worried some other observers unnecessarily. I've heard the heavy duty clutch replacement story on a forum somewhere but touch wood mine's still orig..
When I worked driving old Macs with quad box up north WA on salt ponds, an east european fitter called Stebe reckoned the rattly noise not a problem. Very strronk, these trucks, he used to say!
cheers, DRC

Only real trucks make that sound - its your guarantee of strength!

Thanks, the replys have put my mind at rest.