Solid rear subframe?

[Massive Lee]

All mechanical noises will be transmitted to the shell and amplified. Road noise, bearings, gears etc. Solid subframe mounts are great for a racecar though.

Lee

[nando]

It probably is a bearing.

or just NVH from the solid bushings. All I have is an AKG 75d diff bushing and the NVH is way higher than stock, I thought something was broken the first time I drove it. Still waiting on parts to swap in the M-coupe diff cover.

I wouldn't assume bearing right away. You can hear a bad bearing on an E30 diff pretty well with the stock bushings because it's loud as hell.

[E30Nova]

or just NVH from the solid bushings. All I have is an AKG 75d diff bushing and the NVH is way higher than stock, I thought something was broken the first time I drove it. Still waiting on parts to swap in the M-coupe diff cover.

I wouldn't assume bearing right away. You can hear a bad bearing on an E30 diff pretty well with the stock bushings because it's loud as hell.

Yeah, when I changed all the bushings in the rear suspension to AKG 75D, I started hearing a solid thunk every time I shift. It comes from the rear of the car. I'm guessing that since I didn't hear it before, it's just because of the rear end being so much more solid now.

Hopefully, lol.

Matt