Sonnax 104520-12K 6L45, 6L50, 6L80, 6L90 Transmission Pump Boost Valve Kit
Specifications
| Return Shipping Will Be Paid By | Seller |
| Returns Accepted | Returns Accepted |
| Item Must Be Returned Within | 30 Days |
| Brand | Sonnax |
| Interchange Part Number | 80289NK |
| Items Included | Boost valve kit |
| Manufacturer Part Number | 104520-12K |
| Material | Aluminum |
| Universal Fitment | Yes |
| Performance Part | Yes |
6L45, 6L50, 6L80, 6L90 Transmission Boost Valve Kit Part No. 104520-12KVehicles with listed GM transmissions may exhibit insufficient line rise in drive ranges, soft shifts and/or burnt clutches. These problems may be caused by continuous oscillation of the boost valve within the boost sleeve, creating excessive wear and a path for EPC fluid pressure to leak to 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 Contents Valve Sleeve Spring Symptoms: Low line rise in DriveSoft shiftsBurnt 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.