My 2008 g37s coupe has been leaking dark black fluid from the back. Taking it to mechanic tomorrow any idea what this could be? I'm not sure if it's the bushing or not

 

Looks like a blown diff bushing. Car feel sloppy, esp on accel/decel?

 

Not really, nothing too noticeable I guess. It acceraltes pretty good

 

Every g37 goes through this phase already been through it twice it’s nothing really to worry about, but you can replace it with a firm bushing that they sell online I believe whiteline sells it. The oem is rubber filled with fluid and the rubber gets a rip and the fluid leaks everywhere. You don’t have to replace it unless you track the car or notice any wheel hop, or get vibration from the back end or mid side of the car.