Fuller FRO16210BP

The Eaton Fuller FRO-16210B is a 10-speed manual transmission designed for on-highway, heavy-duty truck applications. It is part of Eaton’s FRO series, which is widely recognized for its simplicity, reliability, and smooth shifting performance in linehaul and regional haul operations. The FRO-16210B is especially favored in applications where operational ease, low maintenance, and durability are key priorities.

General Description

The “FRO” designation indicates several important design features:

• F – Standard forward shift pattern (non-top-two model)
• R – Overdrive transmission (fuel-saving configuration)
• O – Overdrive-style gearing
• 16 – Nominal torque capacity of 1,600 lb-ft
• 210 – 10-speed configuration
• B – Revision level/version of the transmission

This transmission uses a single countershaft, constant mesh, and non-synchronized gear design, requiring the use of a clutch to shift gears (often paired with double-clutching or floating by experienced drivers). It’s engineered for high-performance and cost-effective operation in on-highway applications.

Shifting and Operation

The FRO-16210B uses a standard H-pattern shifter with a range selector. The range selector allows the driver to switch between low and high range, effectively doubling the shift positions using the same H-pattern layout. This simplifies shifting without the added complexity of a splitter (as found in 13- or 18-speed models), making it ideal for fleets and drivers seeking ease of use.

Because it’s a non-synchronized transmission, proper clutching or floating techniques must be used to match gear and engine speed when shifting.

Key Features

• Overdrive Design: The 10th gear is overdrive (0.86:1), which helps reduce engine RPM at cruising speeds, contributing to better fuel economy.
• Durability: Designed to handle heavy-duty use with heat-treated gears and a robust mainshaft design.
• Aluminum Case: Reduces overall weight without compromising strength, helping improve vehicle fuel efficiency.
• PTO Compatibility: Dual side ports make it easy to integrate power take-off equipment such as pumps or hydraulic systems.
• Serviceability: Modular construction allows for simpler diagnostics, repairs, and rebuilds.

Applications

The Eaton Fuller FRO-16210B transmission is well-suited for:

• Regional haul and linehaul trucking
• Dry van and refrigerated freight
• Tanker and bulk hauling
• General freight operations
• Light vocational applications

Its 10-speed layout makes it especially attractive to fleets looking for lower driver training time and simpler operation compared to multi-speed transmissions like 13- or 18-speed models.

Summary

The Fuller FRO-16210B is a versatile, driver-friendly manual transmission that balances performance with fuel efficiency. With its 10-speed configuration and overdrive gearing, it is ideal for highway applications that demand reliability and low operating costs. It offers a practical solution for fleets and owner-operators seeking proven performance, ease of use, and durability in a manual transmission platform.

Technical Specifications:

• Model: Eaton Fuller FRO-16210B
• Type: Manual, 10-speed, overdrive
• Speeds: 10 forward, 2 reverse
• Torque Capacity: 1,600 lb-ft (2,170 Nm)
• Horsepower Capacity: Up to 500 HP (depending on duty cycle)
• Input Shaft Diameter: 1.75 inches
• Input Shaft Spline: 10-spline
• Transmission Weight (dry): Approximately 587 lbs (266 kg)
• Oil Capacity: 28 pints (13.2 liters)
• Lubricant Type: Eaton Roadranger-approved synthetic transmission fluid
• Case Material: Aluminum alloy housing
• PTO Ports: Two (1 on each side)

Gear Ratios

The FRO-16210B features a progressive, evenly spaced gear ratio layout that provides a good balance between starting power and highway fuel economy.

Forward Gear Ratios:

• 1st: 14.80:1
• 2nd: 11.06:1
• 3rd: 8.17:1
• 4th: 6.04:1
• 5th: 4.41:1
• 6th: 3.28:1
• 7th: 2.39:1
• 8th: 1.74:1
• 9th: 1.26:1
• 10th (Overdrive): 0.86:1

Reverse Gear Ratios:

• Low Reverse: 13.21:1
• High Reverse: 3.79:1

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