The Eaton Fuller Mainshaft Gear Auxiliary Splitter, part number 21931, is a direct-replacement transmission gear for Fuller-equipped heavy-duty manual transmissions. This part cross-references to a broad range of numbers including 21931-SP, 21931SP, S-B248, SB248, FUL-21931, ZBF21931, 3088-21931, 35540317, and Navistar OEM number 1668137C1, making it straightforward to confirm a match against existing work orders or parts lists. Sold individually. Call us to confirm proper fitment for your specific transmission model before ordering.
Features
Eaton Fuller OEM part number 21931
Cross-references: 21931-SP, S-B248, SB248, FUL-21931, ZBF21931, 3088-21931, 35540317
Navistar cross-reference: 1668137C1
PAI Industries equivalent SKU: EF61860
Sold as individual unit (each)
For use in Fuller heavy-duty manual transmissions
