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Speed is addictive, and we’re always striving to go quicker and faster, and it seems to be getting easier in the modern world. Take, for example, the ‘07 Mustang GT featured on these pages. Last year, we added a Ford Racing Performance Parts supercharger kit, Steeda 10-rib pulley upgrade, custom tuning (Diablo-Sport), and a set of drag radials. That led us down a path of mid-11s with a best of 11.49 at 119 mph (with 479 rwhp through the stock automatic).

Photo Gallery: 2007 Ford Mustang Drivetrain Upgrades – 5R55S Transmission -Muscle Mustangs & Fast Fords Magazine

Photo Gallery: 2007 Ford Mustang Drivetrain Upgrades – 5R55S Transmission -Muscle Mustangs & Fast Fords Magazine

If you think back, probably one of the first things you did when you got your license was to find the nearest parking lot or group of friends, and lay some rubber to show off. While few of us have “grown up” since then, a nice peel out/burnout/whatever-you-call-it always puts a smile on people’s faces-except for Johnny Law, of course. Most likely, though, after that first time you may have noticed only one tire mark on the ground. Call it the one-wheel-peel or one-tire-fire, either way you only had one tire clamoring for traction back there. This is probably due to the standard, or “open” rear that many cars came with originally, and was most likely the cause of some ribbing from friends and fellow gearheads. You needed to fix this issue, and fix it fast. Usually, the fix entailed swapping out the open rear for Ford’s venerable Traction-Lok limited-slip unit, or if you were packing a 9-inch, you could upgrade to the Detroit Locker for some real fun, but that was about it back then.

Photo Gallery: Classic Ford Drivetrain Upgrades with Aftermarket Differentials – Modified Mustangs & Fords Magazine

Photo Gallery: Classic Ford Drivetrain Upgrades with Aftermarket Differentials – Modified Mustangs & Fords Magazine

Tech | Drivetrain Upgrade
Our ‘68 Torino GT is factory original in every way except for a 4V carb and intake. At just over 100,000 miles, the drivetrain seems to be fine, making no serious noises. We’re planning on some power upgrades in months to come and when the opportunity arose to visit Currie Enterprises of Anaheim, California, to have the company inspect the rear axle on our car, we we’re glad to visit.

Photo Gallery: 1968 Ford Torino GT Currie Enterprised Axle Upgrade – Modified Mustangs & Fords

Photo Gallery: 1968 Ford Torino GT Currie Enterprised Axle Upgrade – Modified Mustangs & Fords