There was a thread on here, someone thought their lower control arm bushing was leaking but it wasnt. Theres a bit of a whine with the SPL diff bushing, but its not bad. It happens when you coast and goes away as the speed drops. I can tell you the easiest way to replace the Diff bushing, and the mistake I made if you want.

Hey man i saw on your sig that you have the SPL diff bushings, does your car make alot of noise since you have it? and and my front lower control arm bushing is leaking too so i'm planning to upgrade to SPL FLCA bushings too if anything... wanted to know your input if you don't mind!