Modified Mustangs & FordsHow To Drivetrain
Speedway Engineering Full-Floating 9-Inch Rearend install
Assembling a track-ready, 9-inch rearend for Project Colt of Personality
We've been modifying our '66 Mustang fastback project for more than a year now, and we're finally starting to make some headway with the drivetrain portion of the build. This month, we show you how our Speedway Engineering full-floating 9-inch rearend goes together, and what is involved with installing Wilwood's full-floater rear brake setup.
While attending the MPMC conference some years back, the good folks at Wilwood showed us the company's new full-floater rear brake package that featured an integrated rear parking drum brake. It was a cool piece of hardware for sure, and a setup that they wanted us to use on our Colt of Personality project. Knowing that we intended to open track the fastback, the Wilwood staff recommended the floater rearend to prevent pad knock back on track—you can read more about that in Jim Smart's article in our Dec. '12 issue where he covered the fabrication of the Speedway housing.
To fill the housing with an appropriately durable third member, we turned to Randy's Ring & Pinion for one of the company's nodular iron cases, as well as every other part that we needed to complete the center section. Randy's offers a large selection of gear ratios and other options to suit most enthusiasts.
Since we weren't familiar with full-floater rearends, we sought out professional assistance with its assembly. It took us a while before we found a suitable shop here in Florida that was familiar with what we were working with. After contacting Advance Driveline in Orlando, Florida, we knew we found the right place. There, shop foreman, Donnie Green, turned our mass of parts boxes into a workable unit. Advance Driveline can meet all of your driveline needs whether you have a rock crawler, a diesel truck, or a hot rod.
In the coming months, we'll be slinging this stout rearend beneath our filly and start moving forward with a number of other modifications such as installing fender flares from National Parts Depot, measuring and fitting custom wheels, and fitting the drivetrain—a mod that is likely to require some transmission tunnel surgery. For now, check out the assembly of this stout 9-Inch build and killer rear brake setup.