Nitro gear noise

Anyone have 488s installed in 3rd gen, have noise like humming or new tire sounding noise come from front diff at 40mph. No noise at all in 2wheel. Side note gained 4.2 mpg so far in city.
TIA

 

And what am I looking for?‍♂️

 

It's just a better place to ask a specific question about gear noise.

 

Tech section bro! Might have better luck than just using the general 3rd gen forum.

 

Ohhhh got yuh. Sorry I'm a noob

 

After calculation correction for speeddo/odo error from new gears (and maybe tires)?

That would be really good.

 

Huh?

 

Whining from the front diff while in 4WD? That a bit of a new one, typically the gear whine is in the rear.

since it's occurring under load I wonder if the setup was wrong.

Not a lot of folks read the technical chat forum. For 4.88 stuff I would post in the "4.88 Mega Thread" here in the 3rd gen section but might give it a few for others to chime in.

@Texoma

 

I was in 4 wheel so it was under load. There is no noise in 2 wheel and only above 40 mpg in 4

 

The axle isn't engaged in 2 wd. Nothing is turning until you engage the 4wd. My guess is, since there was a Gear change, the gear mesh might be setup too tight.

 

You think that is something that will break in or something that should be torn apart?

 

Also it only happens in front diff at 40 when engaged and under load

 

I get some whine from the rear only during deceleration (no throttle applied) above 55mph. Haven’t noticed it any other time.

 

Some people say that they can be noisy

 

4Hi or 4Lo at 40?

 

I'd definitely get it looked at if this noise is new and from recent gear install. Gotta be a warranty on labor.

 

High

 

Yeah just picked it up yesterday. Its doing this during break in cycles.