No one knows transmissions & torque converters like

Sonnax

No one knows transmissions & torque converters like 2008-sonnax-logo-white

Ts robothead 18in high trans rgb
Maybe it’s not the torque converter!

View Transmission Parts for Resolving & Preventing Torque Converter Problems

Nobody knows transmissions like Sonnax.

Sonnax transmission products are the number one choice of large transmission remanufacturers, quality valve body rebuilders, and veteran independent specialists around the world. Our innovative parts are designed to address the root cause of automatic transmission problems, allowing rebuilders to salvage valve bodies with highly effective repairs.

Valve Body Layouts
Valve Body Layouts
Vacuum Testing
Vacuum Testing
Sonnax Smart-Tech® Forward Clutch Drum
Sonnax Smart-Tech® Forward Clutch Drum

Which Sonnax Kit is Right for Your Rebuild?

Line Pressure Booster Kit

Line Pressure Booster Kits
Affordable kit for big performance without a big price tag.

Zip Kits®

Zip Kits®
The first step in correcting common shift problems.

The Sure Cure®

The Sure Cure®
Comprehensive kit for big problems you don't want back.

Performance Packs

Performance Packs
The best parts for performance & heavy duty recalibration.

View NEW Transmission Parts View All Transmission Parts