Fix Mustang IRS Binding With Livernois Motorsports’ Redesigned Differential Brace

Independent rear suspension (IRS) has been a staple under the Mustang since the S550 debuted in 2015, winning over plenty of die-hard stick-axle fans.

Even with a decade of aftermarket development behind it, the factory rear cradle still struggles with wheel hop and binding when drivers put real torque to the pavement.

Answering that problem earned Livernois Motorsports‘ redesigned differential brace the prestigious Best Performance Street Product award during the 2026 SEMA Show in Las Vegas.

Most aftermarket fixes try to cure rearend movement by bolting in solid metal lockouts or rock-hard round bushings that transfer harsh noise into the cabin.

Andy Ricketts from Livernois Motorsports points out that the real flaw in the S550 and S650 chassis is the missing third line of support needed to balance the center section.

When the housing cannot articulate properly, a strange harmonic develops that makes the car buck under load.

Installing Livernois Motorsports’ redesigned differential brace introduces a third line of proprietary elliptical polyurethane bushings that stabilize movement front to back and side to side.

Because the bushings use an elliptical shape rather than a small round profile, they absorb heavy side-loads smoothly instead of bottoming out against a hard stop. Using its in-house CNC equipment, the shop also updated its existing brace design to accommodate factory differential coolers.

Owners of high-performance G.T. 350, G.T. 500, and Dark Horse Mustangs previously had to remove the factory temperature sender and related plumbing just to make the original cradle fit around the cooler.

The revised machining keeps the factory sensor intact and relocates it directly into the coolant path, giving the computer a true fluid temperature reading rather than measuring heat soaked into the metal housing.

Packed with high-strength American Racing Products (ARP) fasteners, the kit handles massive power right out of the box, helping the shop’s own S650 Mustang clock 1.2-second 60-foot launches with otherwise stock suspension hardware.

Mustang owners can grab either the standard version or Livernois Motorsports’ redesigned differential brace for cooler-equipped models directly from the manufacturer today.