GU Patrol noisy transmission
Submitted: Thursday, Jul 28, 2005 at 13:03
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weldman
Is it true that all GU 4.2l turbo diesel patrols have a strange noise that comes from the transfer box at low revs. My Nissan dealer says that as the noise is in all of them to a certain degree then Nissan would not help me. Also could this noise also be responsible for a bad vibration that comes in at 90kph and goes at approx 120kph?
Reply By: GUPatrol - Thursday, Jul 28, 2005 at 18:05
Thursday, Jul 28, 2005 at 18:05
THe noise is called gear chatter and although it comes from the gearbox it is actually caused by engine vibration at low rpm.
The 4.2L engine/gearbox combination is from a bus.
The reference to the clutch plate springs is due to the fact that Nissan uses double springs in the plate to minimise vibration transmited to the body. Those springs are quite soft under low tension but they are progressive.
Sometimes people change the plate to a heavier duty one and the noise disspears or shifts up the rev range...
To overcome this noise the new 3.0L models and the 2.8 have an oil filled flywheel which is designed to absorb vibrations.
The noise is perfectly normal.... and it is from new, no problems....
Will
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Follow Up By: weldman - Friday, Jul 29, 2005 at 10:30
Friday, Jul 29, 2005 at 10:30
Thanks for your
feedback fellas, but should I be worried? The noise i am referring to is not how you have described. My noise is almost definately coming from the transfer box and could be described as a fairly loud grumble/chatter after the vehicle has warmed up. It occurrs in 1st and reverse when I back off and the revs start dropping below 1200 - 1000, as would happen when going round a car park or down the driveway etc. It is a new vehicle and I mentioned the noise to the dealer at 1000km service
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