RSKtakR
Senior Member
Will have to disagree. Richmond and Strange both make a 3.90 and are good quality. Just about any gear will whine. My factory 3.73 has whine to it.
4.10 will require a shift into 5th which I think most will want to avoid. Only reason I am considering a move to the 3.90 is due to the Boss intake on the car. Those running a stock intake should stick with a 3.73. This is all based on a M6 car running 28" tires.
which is why im wanting to have the 3.90's installed over the 4.10's..if and when i do take the car to the strip i will be running 28" tall tires and dont want to make the shift to 5th. my stock 3.31 rear end has a whine on decell as of now. just put the 4.10's up for sale, and keeping an eye open for some 3.90's.