New to NTV: drive train noise

I don't think there's anything you can do with oil to reduce the noise of those gears, short of packing the final drive full of grease, which isn't recommended.
In theory, I like a little molybdenum in applications like that - transmissions, differentials, etc. When I get around to it, I'm going to switch to 75W90 w/ moly.

Markez, when you say that full synth made your Miata quieter, I presume you mean it reduced the valve noise? I think removing all the oil from a Miata engine would make it quieter, too. After a few days, anyway.
 
I got an NT 700 about six weeks ago.

First gear was noisy. Sounded almost like a siren as it changes pitch with speed. All the other gears were smooth and quiet.

I've put about 1500kms on it now and my last ride it started making a whining noise. I rode it about 180kms the week before at highway speeds with no noise, then out of nowhere a whining gear noise in every gear. don't know if it's the gearbox or final drive but it's loud and annoying.

Does this happen after a while? It was basically silent when I bought it with 50,000kms on the clock.

I'm worried there'll be a catastrophic failure cos it suddenly sounds like the gearbox is shot.
 
Sometimes your ears play tricks on you. Comparing this engine to others can get your idea of noise of engine seems different. It's a noisy engine. Somebody in 2012 thought his cam chains were going bad with just 9,000 miles. Turned out was just his ears!! That was a resurrection old post just recently
 
Jackdan Blake said:
I got an NT 700 about six weeks ago.

First gear was noisy. Sounded almost like a siren as it changes pitch with speed. All the other gears were smooth and quiet.

I've put about 1500kms on it now and my last ride it started making a whining noise. I rode it about 180kms the week before at highway speeds with no noise, then out of nowhere a whining gear noise in every gear. don't know if it's the gearbox or final drive but it's loud and annoying.

Does this happen after a while? It was basically silent when I bought it with 50,000kms on the clock.

I'm worried there'll be a catastrophic failure cos it suddenly sounds like the gearbox is shot.
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If memory serves, the NT700 has a straight cut first gear which is inherently whiny. The rest of the gears are helically cut and are quieter. As Woodaddict mentioned, the engine is a wee bit noisy but you will get used to it. If you find another NT down under, you will likely find that it sounds just like yours. The engine/trans combo is pretty much bulletproof. The plastics <sigh> not so much.

Mike
 
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