Gearhead 18in high trans rgb
Faster tougher stronger

Heavy Duty & High Performance Upgrades

Sonnax high performance transmission products meet the toughest challenges faced by hard-working, daily-use transmissions as well as racing units going all-out on the street or track. Products range from innovative upgrades designed to fix everyday problems rebuilders see in their shops to an extensive line of Powerglide components.

Build the
killer 4L60-E
with Sonnax

Whether you’re starting from scratch with a heavy duty/performance build or optimizing a seasoned racing vehicle, key transmission areas MUST be addressed to realize the full potential of these units.

View, print or download build charts
Syclone racing cropped

Ray Lichtenberg's "Hated" Syclone

  • Level 3 Sonnax 4L60/E Build
  • 900 HP
  • 1,000 ft-lbs
  • AWD

Sonnax Smart-Tech®

Regardless of the transmission, Sonnax Smart-Tech products are the best of the best. Through a fusion of top-notch expertise, innovative engineering, technical mastery and precision manufacturing, these groundbreaking parts overcome OE limitations to deliver the ultimate in transmission performance.

Learn more about Sonnax Smart-Tech

Sonnax Performance Goes Beyond the Transmission

Browse our ever-expanding line of race kits, slip yokes and driveshaft components.


All HP Parts