FS6406A Eaton Fuller 6-Speed Transmission | 660 lb-ft | Mid Range | DPX Reman (Exchange)

FS6406A | Eaton Fuller 6-Speed Transmission — Remanufactured by DPX

The Eaton Fuller FS6406A is a 6-speed, single-countershaft manual transmission with a direct 1:1 top gear. It’s a proven workhorse for utility, forestry, and vocational fleets that need reliable shift quality and easy serviceability. Remanufactured in Mansfield, Ohio by Discount Parts Exchange - DPX using top-tier OEM and aftermarket components.

Call DPX to confirm: 419-522-3320.

Specs & Features

• Model: FS6406A (Fuller single-countershaft)
• Torque Capacity: 660 lb-ft (895 Nm)
• Top Gear: Direct drive (1.00:1)
• Synchronization: Synchronized forward gears
• PTO Openings: Left & right, 6-bolt
• PTO Drive Gears: 5th-gear countershaft drive; 38-tooth, ~6.35 pitch, 22° helix, 20° pressure angle
• Oil Capacity: ~19.5 pints (9 L)
• Overall Length: ~25.6 in (650 mm)
• Dry Weight: ~359 lb (163 kg)
• Recommended Lubricant: SAE 50 or synthetic meeting Eaton PS-386

Gear Ratios (FS6406A)

Fleet Builds / Alternate IDs

• TA-C11-077222
• TA-C11-082519
• TA-C11-036253

What’s Included

• Remanufactured Eaton Fuller FS6406A 6-speed transmission rebuilt to your requested spec by Discount Parts Exchange - DPX
• 12-month, unlimited-mileage parts-only warranty
• Tech support from DPX during install and initial run-in

Core Exchange Policy

• Exchange Required: Like-for-like, complete, and rebuildable core.
• Possible Deductions: Cracked/damaged housings, burnt or missing internals, water or low-lube damage, or non-matching core.
• Preparation: Drain and palletize the core for pickup.

Shipping

• Ships via LTL motor freight to verified commercial addresses only.
• No residential delivery.
• Forklift or dock required (liftgate by request).

Image Disclaimer

Photos are representative; final appearance may vary by build and casting revision.

Order & Support

Call Discount Parts Exchange - DPX for pricing and availability: 419-522-3320

Curious What a Ratio Change Will Do for Your Truck?

Use our free Road Speed Calculator to plug in your tire size, current ratio, and target speed/RPM. See exactly what a 3.55, 3.73, or 4.10 would do before you buy.

Open Road Speed Calculator →

Reference Documentation

• Eaton Fuller FS-6406A Illustrated Parts List (PDF)
• Eaton Fuller FSO-6406A Illustrated Parts List (PDF)
• Eaton Mid-Range Service Manual TRSM0110 (PDF)

DPX — Ohio’s Premier Heavy-Duty Drivetrain Rebuilder | Built to Perform. Trusted to Last.