Steve Turner
Former Editor, 5.0 Mustang & Super Fords
September 22, 2010

It's been popular to add gears to Mustangs since the dawn of time. Gears are usually one of the first performance modifications because they make an instant impact in the way the car feels. Sure the right gear makes the car quicker, but it's the seat of the pants that really makes the gear swap one of the most popular Mustang mods.

I really don't know why I waited so long. I guess I had some vague, silly concerns about noise and gas mileage. Could a 700-rwhp GT500 really need gears?

As it turns out, yes it does. Sure the car never had a problem getting out of its own way, but the addition of gears makes dealing with the GT500's naturally tricky clutch engagement much easier. Moreover, the 3.73s keep the car in the happy place of its powerband at all times, and the highway cruising speed is only up a couple hundred rpm. Ultimately, mileage seems to only have suffered marginally. Moreover, the car simply feels snappier and more responsive, and that's what it's all about.

While PVT was under the knife, it was a good time to add some complementary hardware. I opted for a diff girdle from FRPP, a Torsen T2 differential from FRPP, an aluminum driveshaft from Axle Exchange, and a driveshaft safety loop from BMR. To make it all happen, I carted the parts over to ProFab Performance, where renowned gear setup expert Dave Piercey worked his magic with a perfect, noise-free install.

Follow along with the captions to see how Dave brought PVT's driveline up to snuff with its other mods.

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