Product Description
450-42LE Boost Valve Kit
THIS KIT FITS 1998 AND UP MODELS: ISUZU NPR, GMC FORWARD TILTMASTER, CHEVROLET FORWARD, NISSAN UD AND MITSUBISHI FUSO TRUCKS
Sonnax Part Number: 94987-09K
NO TOOLING REQUIRED
The boost valve assembly is designed to increase line pressure in Drive and Reverse. When the Aisin AW 450-43LE sleeve is worn on the inside or loose within the valve body, boost or EPC fluids can leak to exhaust or cross-leak and increase forces on the valve. Leakage to exhaust reduces line rise, while the cross-leaks can result in broken clutch drums or cases. Sonnax main boost valve kit 94987-09K has upgraded materials to prevent wear and restore proper hydraulic control.
- Sleeve is manufactured from highly wear-resistant billet aluminum
- Hardcoat anodized aluminum valve combats premature wear
- Restores proper hydraulic sealing and OE pressure control
- Drop-in Zip Valve™ parts install quickly and easily
PACKAGE CONTAINS
- Sleeve
- Valve
SYMPTOMS
- Delayed Reverse
- Flare shifts
- Clutch distress
- Low line rise
CAUSE
Boost valve and sleeve wear causes EPC to exhaust or cross leak.
CORRECTION
The Sonnax drop-in main boost valve assembly has upgraded materials to prevent wear and restore proper hydraulic control.
Product Videos
Custom Field
Requires Tooling? No
