Doctor Diff 8 3/4 Sure Grip

512Stroker said

Thanks for the come back.
I will be running a set of the Doc's 3:55 gears on the street. Do they run pretty quiet?

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Yes.
I have a set in my Dart Sport that I bought from Cass and have run them for 5 years now with no issues.
They are pretty quiet IMHO, and haven't changed one bit..........