- Transmission & Drivetrain
- Automatic Transmission Components
- Sonnax Boost Valve Kits
The OE boost sleeve wears from repeated oscillation of the boost valve. This wear allows leakage, reduces line pressure and contributes to line pressure instability. Sonnax Boost Valve Kits replace worn components and incorporate a larger boost ratio, which increases line pressure and provides firmer shifts. Sonnax also offers replacement manual and regulator valves.