The Eaton Fuller mainshaft 1st speed gear, part number 4308105, is a genuine OEM manual transmission component designed for heavy-duty applications. This gear fits the mainshaft position and handles 1st speed power transfer within the transmission. Referenced under cross-reference numbers FUL4308105 and FUL 4308105, this is the same part regardless of how it is sourced or cataloged. With an 8.5-inch diameter profile and a 1.5-inch height, this is a direct-fit replacement for the original mainshaft 1st gear position. Contact Pro Gear and Transmission to confirm proper fit for your specific transmission model before ordering.
Features
Genuine Eaton Fuller OEM mainshaft 1st speed gear
Direct replacement for the 1st speed gear position in compatible manual transmissions
8.5-inch diameter x 1.5-inch height profile
Cross-referenced as FUL4308105 and FUL 4308105
Sold individually as a single unit
Tech Specs
- Part Number: 4308105
- Cross References: FUL4308105, FUL 4308105
- Gear Position: Mainshaft 1st Speed
- Transmission Type: Manual
- Dimensions (H x W x L): 1.5 in. x 8.5 in. x 8.5 in.
- Sold As: Each
