gu vibration
Submitted: Tuesday, Oct 21, 2003 at 20:58
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john
Left a post here a couple of weeks ago about 2 vibrations in my GU 3.0 td. Been to Nissan and was told that the diff needed new oil [valvaline 140] because it should be chanded every 40.000 ks and
mine has done 79.000ks its due. Also if you dont do much off road stuff then oil dose not get into the areas of the diff that it needs to because your not working it. Fair enough problem solved.The other problem with the engine/pedal vibration was not solved. He said he has had other 3.0 tds come in with the same vibration and they have tried to locate it but with no luck. He reckons that it maybe exhaust resination? Any experts out there willing to explain this? Also i have driven newer patrols like
mine with the same vibration but not as bad.I would like to here from other 3.0 td owners that maybe have this problem. Its like someone holding a vibrator against the pedal mainly when your going slow. Its not there when its under load. Thanks.
Reply By: David N. - Wednesday, Oct 22, 2003 at 09:23
Wednesday, Oct 22, 2003 at 09:23
Couldn't agree more...
You pull enough G's (acceleration, braking & cornering) to get the oil everywhere, and besides, a large percentage of 4WDs never go off road. If someone is stupid enough to make such a suggestion then I would treat everything he says with GREAT suspicion. IMHO
Sorry, though, know of a number of GUs that have no such problems with the vibration (or anything else!!!) so can't help you there. Not helpful I know. Cheers
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Reply By: Member - Bradley- Wednesday, Oct 22, 2003 at 10:08
Wednesday, Oct 22, 2003 at 10:08
Hmmm, had a similar problem with our new work ute V6 rodeo (one of many problems!!) it had a chronic diff shudder and was basically operating as a fully locked diff most of the time, numerous dealer visits later, still no joy. So i took a wander down the warehouse here at work and grabbed some fully synthetic 75 / 140 lsd oil and changed it myself.
Well at 8900 km the diff oil was filthy black with heaps of iron and brass content visible. Drove the ute about 10km and hey presto problem solved, now smooth as, and quiet as a mouse. As a matter of interest i submitted a sample of the old oil to our lab for anaylasis and they found that as
well as the high contamination present, they couldn't identify the viscosity of the oil, their best guess was that it a blend of two or more types and grades of oil. I have asked the manufacturer of said vehicle to please explain why the oil fitted was not as per the service schedule and specs.. Still Waiting (surprise surprise)
Lesson one do not take their word for the quality of the lubes they use. and change diff oils at 40 / 50 km .
As for the vibe, if it is the exhaust pulsing with the torque of the engine, get down to a good exhaust
shop and get a high quality flex joint fitted as far forward in the pipe as you can. and
check the condition of the hangar rubbers.. cheers Brad.Life is short- but there's always time for a yarda.
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