The Eaton Fuller 4303620 is a 1st-speed mainshaft gear for heavy-duty manual transmissions. This coarse-pitch gear is listed in the illustrated parts manuals for 38 Eaton Fuller models, covering the RTO-10910B, RTO-14910B, RTO-16910B, RTO-18910B, RTX-11710B through RTX-16710B, RTXF-11710B through RTXF-16710B, FM-14D310B-LST, FM-15D310B-LST, and related variants including AS, DM, and AS2/AS3/DM2/DM3 suffix builds. It is indexed as item 8 in the mainshaft assembly group and supersedes part number 4303618. Call us to confirm proper fit for your specific transmission serial number.
Interchanges:
- 4303620-SP
- 85105893
- S-20421
- FULLER 4303618
- MACK 3088-4303618
- MACK 3088-4303620
- PAI Industries 900040
Features
1st-speed mainshaft gear for Eaton Fuller heavy-duty manual transmissions
Coarse-pitch design; must be used as specified in the RTX-11710B parts manual
Supersedes Eaton Fuller part number 4303618
Covered in parts manuals for 38 transmission models including RTO, RTX, RTXF, and FM series
Sold individually (quantity: 1 each) by Pro Gear and Transmission
Tech Specs
- Part Number: 4303620
- Supersedes: 4303618
- Gear Position: 1st Speed
- Gear Type: Mainshaft, Coarse Pitch
- Transmission Series: RTO, RTX, RTXF, FM (10-speed through 18-speed variants)
- Sell Pack: 1 Each
Additional Information
Fitment covers 38 Eaton Fuller transmission models documented in manufacturer illustrated parts lists. RTO series models include RTO-10710B-AS2, RTO-10910B-AS2/AS3/DM2/DM3, RTO-12710B-AS2, RTO-12910B-AS2/AS3/DM2/DM3, RTO-14710B-AS2, RTO-14910B-AS2/AS3/DM2/DM3, RTO-16910B-AS2/AS3/DM2/DM3, RTO-18910B-AS2/AS3, and RTOM-16910B-DM3. RTX series includes RTX-11710B through RTX-16710B and RTXF-11710B through RTXF-16710B. Additional models: RT-14910B-AS2, RTAO-16710B-AS, FM-14D310B-LST, and FM-15D310B-LST.Used in 39 Eaton Fuller models
