The Eaton Fuller mainshaft 1st speed gear, part number 20389, is a manual transmission gear for heavy-duty truck applications. This gear measures 8.5 inches in diameter and 1.5 inches in height. If you are matching this part to a specific Eaton Fuller transmission model, call us to confirm proper fit for your application.
Interchanges:
- 19246
- 20389-SP
- 27201-5208
- 35530210
- 62640
- 62640HP
- E2HZ7100E
- EF62640
- EF62640HP
- FUL-20389
- HF20389
- S-7224
- SAS-20389
- ZBF20389
- Mack 3088-20389
- Mack 3088-19246
- Mack 4333-591855C2
- Navistar 591855C1
- Navistar 591855C2
- Navistar 591855
Features
Mainshaft 1st speed gear for Eaton Fuller heavy-duty manual transmissions
8.5 in. diameter, 1.5 in. height
Sold individually (unit of measure: each)
Genuine Eaton Fuller part, available from Pro Gear and Transmission
Tech Specs
- Part Number: 20389
- Part Type: Mainshaft 1st Speed Gear
- Transmission Type: Heavy-Duty Manual Transmission
- Diameter: 8.5 in.
- Height: 1.5 in.
Used in 69 Eaton Fuller models
