Transmission Products
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.
New Parts Tech Articles Valve Body Layouts Vacuum Test Guides
Which Sonnax Kit is Right for Your Rebuild?
Line Pressure Booster Kit
Affordable kit for big performance without a big price tag.
- Affordable, drop-in kit with no special tools required
- Increases torque capacity
- Improves shift feel without low-speed harshness
Zip Kit®
The first step in correcting common shift problems.
- Installs quickly & easily without any special tools
- Stops leaks so the valve body works the way it's supposed to
- In-depth tech booklet for installation, plus diagnostics & repair
The Sure Cure®
Comprehensive kit for big problems you don't want back.
- Restores OE shift quality
- Repairs biggest trouble areas to reduce comebacks
- Step-by-step instructions for comprehenseive valve/pump body restoration
Performance Pack
The best parts for performance & heavy duty recalibration.
- Firmer shifts under load without low-speed harshness
- Consistent recalibration results with tuning options
- Improved durability
- No special tools required
Sonnax Industries is an Employee-Owned Company
1 Automatic Drive · Bellows Falls, VT ·
05101-0440 · U.S.A.
800-843-2600 ·
802-463-9722