PRI 2010: Moser Expands WaveTrac Differential Line

One of the known shortcomings of a typical torque biasing differential is its loss of drive under zero or near-zero torque conditions. The WaveTrac is the latest and greatest in differentials from Moser that is designed to help you over come those “one wheel peel” problems.  Moser has recently expanded their applications to also include Ford 8.8 and 9-inch 31-spline applications.

The WaveTrac uses converging / diverging wave profiles that are placed on one side gear and its mating preload hub. As the two side gears rotate relative to each other, each wave surface climbs the other, causing them to move apart. This imparts an increased normal force through the side gears, increasing the bias ratio as a function of load. This increase occurs automatically only when conditions find it necessary, and it ‘reverts’ back to its nominal bias ratio quickly and seamlessly, maintaining optimal drive-ability and performance at all times. It’s like having two differentials in one: you get the benefit of a higher bias ratio when needed without detriment to the car’s handling.

• No loss of traction under low/partial throttle applications
• Current GM 12-bolt and Ford 8.8 and 9-inch applications
• Benefit of a higher bias ratio when needed without detriment to the car’s handling

About the author

Mark Gearhart

In 1995 Mark started photographing drag races at his once local track, Bradenton Motorsports Park. He became hooked and shot virtually every series at the track until 2007 until he moved to California and began working as a writer for Power Automedia. He was the founding editor for its first online magazines, and transitioned into the role of editorial director role in 2014. Retiring from the company in 2016, Mark continues to expand his career as a car builder, automotive enthusiast, and freelance journalist to provide featured content and technical expertise.
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