Is it possible to have a Ford 9-inch without an annoying amount of gear whine? Of course, but at what cost? How much time and money would you possibly spend chasing down the issue when you can now simply bolt an 8.8-inch center section into your 9-inch housing thanks to the engineers at DSE? Yes, it's that simple. Detroit Speed now offers five different gear ratios and a complete assembly that will bolt directly into your 9-inch housing. Complete with forged alloy steel carrier bearing caps, a high-strength nodular case, ARP hardware, a 1350 pinion yoke, and a 31-spline Eaton Truetrac differential, it's built to handle some serious power and deliver it quietly and efficiently. *The FN988 Case is compatible with all 8.8-inch gears, differentials, and spools. Alternate options are available. Contact us for custom builds or combinations not listed.