S-2688 Eaton Fuller Mainshaft Assembly

Description

The Eaton Fuller Mainshaft Assembly, part number S-2688 or S2688, is a direct OEM replacement transmission main shaft for heavy-duty manual transmissions. Sourced from Eaton Fuller, this assembly measures approximately 16.125 inches in length with a 3.25 x 3.25 inch cross-section profile. Cross-references include 12474615, 3088-S2688, 35530714, 3949040, 4303404, 4303913, S2688-SP, and SF234, among others, making it a widely applicable service part across multiple fleet and parts-counter applications. Pro Gear and Transmission carries this as a genuine Eaton Fuller component. Call us to confirm proper fit for your specific transmission model.

Features

Genuine Eaton Fuller mainshaft assembly for heavy-duty manual transmissions
Part number S-2688 or S2688 (also listed as HFS-2688)
Approximate length: 16.125 in.; cross-section: 3.25 x 3.25 in.
Cross-references: 12474615, 3088-S2688, 35530714, 3949040, 4303404, 4303913, S2688-SP, SF234, and others
Sold individually (unit of measure: each) by Pro Gear and Transmission

Tech Specs

• Length: 16.125 in.
• Cross-section (H x W): 3.25 x 3.25 in.
• OEM Part Number: S-2688 or S2688
• Alternate Part Number: HFS-2688
• Cross References: 12474615, 3088-S2688, 3088S2688, 35530714, 3949040, 4303404, 4303913, FUL-S2688, S-F234, S2688-SP, SF234, ZBFS2688

Used in 203 Eaton Fuller models