The Eaton Fuller K-3377 is a mainshaft replacement kit for manual transmissions, sold by Pro Gear and Transmission. The kit is cataloged under Eaton part number K-3377 or K3377. According to the Eaton kit bill of materials, this assembly includes one mainshaft assembly (S-3108), one mainshaft spline key (4304615), two spacers (16288), two washers (4300830), and one instruction letter (L-9822). All components ship together as a single kit, giving technicians the core hardware needed for a mainshaft replacement service. Call us to confirm proper fit for your transmission application.
Interchanges:
- HFK-3377
Kit Contains:
| Qty | Part Number | Description |
| 2 | 16288 | Spacer |
| 2 | 4300830 | Washer |
| 1 | 4304615 | Mainshaft Key Special |
| 1 | S-3108 | Mainshaft Assembly |
Features
Eaton Fuller part number K-3377 or K3377
Includes mainshaft assembly (S-3108) as the primary component
Mainshaft spline key (part 4304615) included in kit
Two spacers (part 16288) and two washers (part 4300830) included
Instruction letter (L-9822) packed with kit
Sold as a complete single-unit kit for mainshaft replacement service
Tech Specs
- Part Number: K-3377 or K3377
- Kit Contents: Mainshaft Assembly (S-3108) x1, Mainshaft Spline Key (4304615) x1, Spacer (16288) x2, Washer (4300830) x2, Instruction Letter (L-9822) x1
- Unit of Measure: Each
