The Eaton Fuller Synchronizer Assembly, part number A-5721 or A5721, is a genuine Eaton Fuller manual transmission component covering the 1st-2nd gear position. This is a direct OEM replacement for the synchronizer assembly in compatible Eaton Fuller manual transmissions. If you need help confirming this is the correct synchronizer for your transmission, call Pro Gear and Transmission and we can help match it to your application.
Interchanges:
- 12545958
- 1665654C3
- 900113
- A5540
- A5721-SP
- FUL-A5721
- ZBFA5721
- Fuller 3315707
- Fuller A-5214
- Mack 3088-A5214
- Mack 3088-A5540
- Mack 3088-A5721
- Navistar 1665654
- Navistar 1665654C1
- Navistar 1665654C2
Features
Genuine Eaton Fuller synchronizer assembly, part number A-5721 or A5721
1st-2nd gear position application
Direct OEM replacement for compatible Eaton Fuller manual transmissions
Sold individually (each) by Pro Gear and Transmission
