Eaton Fuller 4302420 Second-Speed Countershaft Gear

Product Overview

Genuine Eaton Fuller 4302420 second-speed countershaft gear for supported twin-countershaft manual transmissions.

Technical Identification

• Replaces: 4302404 and 4302530 in supported Eaton catalogs
• Catalog example: FRO-16210C
• Typical quantity: Two as a matched upper/lower countershaft pair

Application and Service Notes

Confirm the transmission model and serial number, upper and lower countershaft arrangement, physical tooth count and helix, bore and key fit, mating second-speed mainshaft gear, quantity, ratio set, and serial range. Inspect and match both countershaft gears and all mating components.

Please confirm 4302420, the transmission identification tag, second-speed position, physical teeth, countershaft configuration, mating gear, quantity, and ratio before ordering.

Parts Verification and Ordering Notice

Please confirm the existing part number, component identification, dimensions, specifications, position, quantity, and application before ordering. Cross-reference numbers, parts catalogs, service manuals, repair manuals, PDF references, figures, and application information are reference material only and may contain errors, omissions, superseded information, or model-specific differences. Please contact All Truck Gears before ordering when the application or interchange is uncertain.

Technical References and OEM Documentation

• Eaton Inforanger — FRO-16210C Countershaft Group
• Eaton Download Center — Illustrated Parts Lists and Overhaul Manuals