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Np300 stx vibration

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Bakes

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Hi all. I have the same vibration on my STX np300. 80- 110km/h and the thing gets a vibration through the seats and cab. I'm so over it!. perfect new bitumen highway up to the sunny coast and it's wobble city!
Toyo tyers had 'flat spot removal procedure done. no different. Bought new all terrains, no different. Dealer swapped rims and tyers from another np300, same type. Was better, but needs to be tested on the same road that i experience the vibration. Put mine back on, shocking. Dealer has acknowledged that "yes we have a problem". If the tailshaft is out of balance, where do i get that checked?
If it is still under warranty it is Nissans responsibility to get the tail shaft checked, especially since they acknowledged the problem.
 

Maxnp

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I've been trying to find out the same thing, mine has the 100 to110km vibration and just starting to go through the process of trying to get it sorted with Nissan.
 

L3T5G04x4

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Vibration in my Nissan Navara 2017 ST 4x4 auto 1.5 months old, its, not shaking like mad as some of you but a I can hear a vibration, only feel slight vibration from 90-95km/h, more audible at 100km/h peaks at 105 km/h and on 110km same noise level as 100km.h, at 120km/h its similar to 90km/h almost bearable. Best described as a big diesel train sound in the distance but present in the cab (very annoying on a long journey at 100 - 110km/h)

I replaced tyres with A/T straight from the dealer so never had change to hear problem on original tyres , I visited the tyre centre before taking it to the dealer to check balance(wheels were rebalanced and no change to vibration), with 1000 km service I brought vibration issue to their attention, workshop foreman went with me on a drive and heard what I was talking about after a while and said they'll will have a look (personally I thought prop shaft), I left it there for a few days. Picked car up and they said it was the tyres I fitted, they fitted another set from a new Navara and apparently resolved issue....what I thought would happen.

I kept the original tyres so suggested to service manager it could be the rims after reading post here and they should re-fit original tyres to eliminate tyres/rims. Left car there for a week. After many calls finally gave me update that its not the tyres, as noise was still present with original tyres and that they have continued to fault find and narrowed it down to the diff.

Nissan have requested audio recording (use microphone magnets to track the noise/vibration down)from dealer workshop, I'm waiting for answer in the mean time Dealer offered me a Brand New Demo to drive around, 4x4 Auto SL, and YES its doing the same thing not quite as loud as mine? Mine was build Sep 2017 at Plant 6 ( Not sure where that is), Demo built July 2017 also at Plant 6. Any one with updates in this issue?

Also check your chassis welds , spots of paint missing and rust appearing like mine, its also present on the Demo and show room units?
 
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LJG

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I understand you guys are all under warranty, but has anybody actually removed a tailshaft and put it in to be balanced? Nissan will only change them with another one, not send them out for balancing.
 

L3T5G04x4

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Np300 SL Vibration

Hi LJG, nope still early days for me, Ill let them try and sort it before I tinker around and void warranty. I'll make the suggestion to them though. Latest Update is they are waiting for Nissan's approval to remove front drive shaft and do test drive, so I guess the diff is of the table again, its been there for almost three weeks....argh
 

Czechmate

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Hi guys
Just thought I'd chip in with my story as it may be relevant.
Ive got a 2007 d40 which i understand had a different engine, diff and transmission but bear with me
When I bought it in 2013 with 25k on the clock, it had a shudder at 100-110 kph too
After talking to lots of people and reading about the issue i discovered it was the transmission getting a vibration up when the torque converter locked in at ~95kph
I changed the fluid to Valvoline maxlife auto trans fluid and the vibration went away over the following few weeks.

Are all you guys driving automatics?
 

L3T5G04x4

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Np300 SL Vibration

Hi Anand. Mine is an Auto.

Thanks for the suggestion, with mine I don't think that will solve the issue, nor do I think the Nissan Workshop would put other oil in the box other than what is prescribed by manufacturer due to warranty

See I have done the following experiment on a long straight:

- brought it up to speed 120km/h
-proceeded to put in in Neutral
- turned the engine off, no I did not turn the key all the way you don't want to lock the steering
- and no there weren't any cars around so I didn't need to brake without assistance of the booster as it's not under vacuum with engine off
no judgement please I know all the risks involved, but I needed to isolate the torque converter Auto Box and Engine flywheel.
-With everything nice and quiet coming to 105km the vibration peaked as before, what does that tell me (Prop shaft)
- Started car back up , brought the revs up to 2000rpm and slipped back in D no worries.

Does this experiment entirely exclude the Torque converter whilst free wheeling (I know this is no different to towing an auto which you shouldn't do without removing the pro shaft), I'm not 100% sure as I'm not that familiar with Auto Boxes, I know the Prop shaft would be turning, presume the gearbox main shaft was turning but with no gears engaged the torque converter in theory wasn't engaged....your thoughts anyone with auto box experience, does free wheeling exclude the torque converter as a problem?
 
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Old.Tony

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There are two parts to the torque converter.

The input side turns when the engine turns. Turning off the engine stops that.

The output side turns when the gearbox drives it. Placing the gearbox in neutral stops the output side.

The bigger concern with doing that is the oil pump in the gearbox is driven by the output side (attached to the input shaft, but that's what the torque converter output shaft is connected to). This means that no oil is pumped through the gearbox while you're in neutral and the engine is off.

However, putting that aside, your assumption is correct and your test is therefore valid. The TC isn't responsible for the vibration. Because you've negated everything forward of the gearbox output shaft, the conclusion must be that your vibration is coming from one of the drive shafts, an axle or a wheel/tyre.
 

L3T5G04x4

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Np300 SL Vibration

Hi Old.Tony thanks for that insight I am very familiar with manuals but was just not 100% sure on the Auto. Wont be doing that all the time that's for sure. I just freewheeled for 20 seconds max and wouldn't expect any harm done, I did not consider the oil pump not turning in my test though....what oil pump.... :confused3: I hope Nissan workshop track down the source of vibration I just don't want it back if they don't, my money is still on a drive shaft.
 

Old.Tony

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The auto transmission has a pump inside that delivers oil through to all of the innards. No pump = no delivery but if the output shaft of the gearbox is turning, then some few innards are also turning but without oil being delivered. At 120km/h they'll be turning quite quickly, too, hopefully just 20 seconds didn't cause it any drama.

That's the reason why you can't tow an auto for extended periods, because even in neutral, some of the gearbox innards are moving but the oil pump isn't. Manual doesn't have that issue because by turning, the gears pick up the oil and throw it around.
 

L3T5G04x4

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Thanks Old.Tony. I did a bit of youtube research on Torque Converters and auto box planetary gear systems, its quite fascinating how it all works. TC is Basically a turbine liquid coupling. My Ute is still at service centre, Nissan approved the replacement of the diff, they are still waiting for a part before it all goes in, so much mystery......what is this mysterious part, hopefully its a prop shaft that is balanced and perfectly in round! I can only assume they removed front drive shaft and did test drive with no improvement, detail is not very forthcoming :-( so I guess they are back at the diff being the problem a month later.
 

the_bluester

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Been a while since I have posted on here. I had a trawl through this thread and reckon people are talking about the same issue I have with my D23.

Around the 100/110KMH mark mine intermittently develops a shake, I would not call it a vibration as I think that tends to confuse the issue with the likes of a tailshaft vibration that makes the car buzz. In my case at least it is like an poorly balanced wheel, had it balanced a couple of times with more or less no change to the car. When it gets going the tub gets a fair shake on, you can see it as mine has a canopy fitted and you can see the canopy shaking in the mirror.

I reckon it is suspension related, mainly a poor match with the 18" wheel and tyre package. When I test drove an ST I thought it was a nicer package on the road than the silly bloody 18" things on the ST-X, they just add cost, harshness and noise in the name of cosmetics. What I have found is that when mine is somewhat loaded the issue goes away. We had a week away on the school holidays and when we had the gear in the back (Couple of hundred kilos) it was as smooth as you could ask for, I drove it for hours at a time without an issue. Likewise when I tow my track car, not so much as a quiver.

I have played with tyre pressure quite a bit and it improves it a touch but to make it much better you have to lower them further than I like to go. I suspect better dampers would probably rein it in, I might have to see if I can extract some money from my lease fund (It has a silly positive balance from my last car) and throw a set of Bilsteins at it. The body control over long undulations I would put down as marginal at best anyway so a change would probably improve the car. Mine is a series 2 with apparently much better body control, I hate to think what the NP300 badged cars must have been like.
 

LJG

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I did not have the issue with my series 2, till I changed recently to 285/60/18 all terrains. Then it started, which didn't really surprise me given the extra weight of the bigger all terrain tyre. Balancing did not fix it so I tried some SupaMax glass tyre balance beads. I put 6oz (half a bag) in each rear tyre. Problem solved. At $5 for the bag it was a cheap fix.
 

2017

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G'day everyone.
I'm new to the forum and hope that somebody can help me out.
I bought my new NP300 STX in January this year. It has had a vibration problem from new. The dealer originally acknowledged this. They have swapped wheels and tail shaft. I've lost count how many wheel balances it's had. I traded a D40 V6 4lt petrol in on the NP300. That was my first mistake, the D40 rode much better on sealed roads.
Now that I'm no longer being helped by Nissan, I took the car to another tyre specialist who said that there is noting wrong with wheels and tyres and as far as he's concerned its a vehicle problem, take it up with Nissan. But Nissan say the vibration is within their parameters. It's horrible to drive on the highway.
Any clues?
Hi D23, is your problem with the Vibration sorted
 
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Could be a multitude of problems, have they removed the front driveshaft and tested it on road with it removed?.
Very unlikely to be the drive shaft unless it's been removed and installed upside down. Don't laugh, had this happen in my classic 2000 Datsun Roadster back in the 90's. Took me 2 months to work out the problem darn it.
 

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