Haan

This used to happen occasionally but as of today every time the speedometer crosses 21mph it makes a loud grinding noise all the way down to 0. It doesn't matter what gear I'm in (SST), if I'm in neutral, or if I'm on the brakes or engine braking/coasting. There is no grinding when accelerating at any speed or decelerating above 20mph.

Here's a video: https://streamable.com/wyyxf

Other than this loud grinding the car drives perfect, shifts perfect, and makes no other noises. I'm stumped by this because some threads lead to it being the t-case but they don't have the noise at a specific speed range.


2010 Evo MR Touring
-Cobb AP Stage1+
-Cobb SF Intake
-Corsa Catback

Napalm_Enema

Can you feel it in the pedal or shifters?

Feels like transfer case based on how you describe it is there any way to hook up a mic closer to that to see if it is the noise you're hearing? Those are about $4500 new which sucks, but you could probably find a used one as well there are a lot of retired MR's around with more than likely pristine transfer cases.

Haan

I'm not sure what you mean by this as its an MR w/ the SST so when slowing down it feels normal. Also, could it still be the transfer case even if hear the noise when coasting to a stop in neutral?