PHP 8.8 Axle Braces

The 8.8-inch axle under your V-8 Mustang is a fairly robust unit, easily able to withstand the rigors of factory horsepower working through original-equipment tires. But, let’s have a show of hands. Is anyone still running factory horsepower? We thought not.

When the 8.8 runs into trouble is after the inevitable aftermarket horsepower fairy waves her magic wand—especially when ultra-sticky drag radials or slicks are bolted on for those 3,000-plus-rpm clutch dumps on a starting line liberally sprayed with VHT. Under these brutally stressful circumstances, what can and does result is a bent axle tube. The tubes tend to bend back and down as much as ¾ inch, according to Paul Svinicki of Paul’s High Performance.

The symptoms? If you hear the rear brakes squealing at launch, your axle is bending. Vibration, too, becomes a real problem.

The solution? PHP’s new 8.8 axle braces, which simply triangulate the outside ends of the axle to the front of the differential pot.

Horse Sense: Axle braces may be particularly important on ’99-and-up Mustangs, which, with their wider rear tracks, have axles about 1.5 inches longer than previous versions.