Description
6L45 / 6L50 / 6L80 / 6L90 Boost Valve Kit, Sonnax 104520-12K.
Vehicles with listed GM transmissions may exhibit insufficient line rise in drive ranges, soft shifts and/or burnt clutches. The continuous oscillation of the boost valve within the boost sleeve can cause these problems, leading to excessive wear and creating a path for EPC fluid pressure to leak to the exhaust. Sonnax boost valve kit 104520-12K has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control. The sleeve also has a slightly larger EPC feed orifice to provide quicker throttle response. A new pressure regulator valve outer spring is also included to replace weakened original springs and provides a modest 5 psi increase across the pressure curve.
- Boost sleeve is manufactured from highly wear-resistant billet aluminum to prevent wear
- Larger feed orifice provides quicker throttle response
- Replacement spring provides modest 5psi line pressure increase
- Drop-in Zip Valve™ parts install quickly and easily
- Valve
- Sleeve
- Spring
Symptoms:
- Low line rise in Drive
- Soft shifts
- Burnt clutches
Cause:
Wear of the boost valve sleeve allows EPC fluid pressure escape to exhaust.
Correction:
Sonnax drop-in boost valve kit has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.
