Grubee Stage III gearbox noise

[Trey]

I finally put a muffler on this beast. Looks good to me from the saddle, and it sounds nice.
Here's my problem; moving around at 5mph or so, all sounds good. When I get up to my standard blistering speed of 15mph, the gearbox is much louder than my engine and exhaust combined. It always was pretty loud, but I can really hear it now.
I use ATF in this gearbox (thanks GearNut!), and it works great. Any suggestions on how to deal with this noise situation?

 

[Trey]

I'm not sure if posting again will bring any new attention to this question, but I could use some guidance if anyone can help...

 

[BigBlue]

A long-time member posted here recently about the long-term usage of a Stage III kit and recommended the thickest and stickiest marine grease for the gearbox. All sorts of combinations of liquids and grease have been tried.

Good Luck,

Chris
AKA: BigBlue

 

[Trey]

Thanks Chris, it's loud enough that I've really been wondering. I'll check some more.