The Eaton Fuller Mainshaft Gear, part number 20597 or 20597-SP, is a direct-fit gear for Fuller 8609 Series and Fuller 7608 Series manual transmissions. This part also carries Mack cross-reference numbers 3088-20597 and 4333-1651327C1, as well as Navistar numbers 1651327 and 1651327C1, making it a verified interchange across multiple OEM vehicle platforms. Additional cross-references include 20597SP, FUL-20597, ZBF20597, and E7HZ7142F. Sold individually. Pro Gear and Transmission stocks genuine Eaton Fuller drivetrain components, call us to confirm proper fit for your specific transmission build or application.
Features
Fits Fuller 8609 Series manual transmissions
Fits Fuller 7608 Series manual transmissions
Cross-references Mack 3088-20597 and 4333-1651327C1
Cross-references Navistar 1651327 and 1651327C1
Additional cross-references: 20597-SP, 20597SP, FUL-20597, ZBF20597, E7HZ7142F
Sold as individual gear (1 each)
Tech Specs
- Part Number: 20597
- Alternate Part Number: 20597-SP
- Application: Fuller 8609 Series Manual Transmission
- Application: Fuller 7608 Series Manual Transmission
- Cross-Reference - Mack: 3088-20597
- Cross-Reference - Mack: 4333-1651327C1
- Cross-Reference - Navistar: 1651327
- Cross-Reference - Navistar: 1651327C1
- Additional Cross-References: 20597SP, FUL-20597, FUL20597, ZBF20597, E7HZ7142F
- Unit of Measure: Each
