4-Speed Transmission
The Jasper 4-Speed transmission has slowly evolved into the best performing transmission on the NASCAR circuit. While we specialize in NASCAR, there are many racing series around the globe that could benefit from this durable transmission.
Smooth and Reliable
Most Aerodynamic
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Faster shifting
The Most Reliable Transmission
Since its inception in 2006, the Jasper Transmission, manufactured and designed by Harrah Enterprise, has transitioned from a 3-rail shifting mechanism to a smooth single rail that has proven to be not only the most reliable transmission but also the most aerodynamic. In 2018, it has won nearly every single race in competition this year annihilating its competition. While we know we have the best transmission in NASCAR, we are constantly innovating this piece of machinery.
Harrah Enterprise introduced the new and improved "Direct Drive" transmission in the 2025 Nascar season. It has already found its way to Victory Lane several times! The new transmission features less moving parts and makes it easier for drivers to shift.
Harrah Enterprise has propelled their NASCAR clients to Championships in 2023, 2024, and 2025!
Championships
This transmission helped Kyle Busch win his 1st championship in 2015 on the way to helping Martin Truex Jr win his championship in 2017. While winning championships has been an honor, we are hungry for many more championships down the line.
In 2020, this transmission won 25 races and was featured in the car of each of the final four Title Contenders at Miami Speedway. Kyle Busch, Kevin Harvick, Denny Hamlin and Martin Truex Jr shifted this transmission in the final race of the year. Kyle prevailed to win his second championship.
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In 2023, Haas Factory Race team dominated the Xfinity Series Championship to earn their inaugural championship on the Xfinity side with Cole Custer driving it to the win.
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In 2024, Harrah Enterprise and Junior Motorsports partnered together to dominate the regular season and playoffs with Justin Algier winning his first Championship in the Xfinity Series.
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In 2025, Harrah Enterprise powered their way into another Championship with long time client Richard Childress Racing! Jesse Love was the pilot of the the #2 Chevrolet for this Xfinity Series Championship!
