Fuller FRO16210CP

The Eaton Fuller FRO-16210C is a 10-speed manual transmission designed for on-highway heavy-duty applications, specifically engineered for durability, performance, and driver-friendly operation. As part of Eaton’s popular FRO transmission family, the FRO-16210C builds upon the legacy of dependable shifting, efficient gearing, and cost-effective operation in demanding trucking environments such as regional haul, dry van, tanker, and general freight service.

This transmission is especially valued by fleet operators and owner-operators for its balance of strength, fuel economy, and ease of use—making it a staple in Class 8 truck applications across North America.

Model Designation Breakdown

• F – Standard forward-shift pattern (non-Top 2 configuration)
• R – Overdrive transmission for better fuel efficiency
• O – Overdrive gearing (as opposed to direct drive)
• 16 – Nominal torque rating of 1,600 lb-ft
• 210 – 10 forward speeds
• C – Revision/version of the transmission, typically with minor design or manufacturing updates

General Description

The Fuller FRO-16210C is a constant mesh, single-countershaft, non-synchronized manual transmission. It uses a range-type shift system, allowing drivers to operate five gear positions across two ranges (low and high), using a standard H-pattern shifter with a range selector. Unlike Eaton’s multi-speed transmissions like the 13- or 18-speed, this 10-speed unit offers a simpler shifting system, ideal for linehaul drivers who value straightforward gear operation without sacrificing performance or torque capacity.

Operational Characteristics

• Shifter Type: Standard H-pattern with a range selector (no splitter)
• Shifting Method: Non-synchronized; requires clutching or floating techniques by trained drivers
• Range Split: The transmission divides its gears into two ranges (low and high), toggled by the range selector. Gears 1 through 5 are in the low range, and gears 6 through 10 are in the high range (same shift pattern, different range).

Key Features

• Overdrive Top Gear (0.86:1): Reduces engine RPMs at cruise speeds, enhancing fuel economy and engine longevity.
• Simplified Operation: Designed for ease of use with fewer shifting complexities than multi-speed transmissions.
• Aluminum Housing: Lightweight yet strong, contributing to reduced vehicle weight and better fuel efficiency.
• Reliable Durability: Engineered with heat-treated gears and robust components to ensure long service life.
• PTO Capability: Dual side ports provide flexibility for mounting auxiliary equipment such as pumps and hydraulic systems.
• Maintenance-Friendly: Modular component design simplifies inspection, servicing, and rebuilds.

Applications

The FRO-16210C is widely used in:

• Regional haul and long-haul freight
• Tanker and bulk commodity hauling
• General freight and dry van service
• Light vocational and fleet operations
• Fleets prioritizing fuel economy and ease of driver training

Its 10-speed layout makes it an ideal fit for trucking operations that do not require complex shifting systems but still need the power and versatility to handle varying terrains and loads.

Summary

The Eaton Fuller FRO-16210C manual transmission delivers dependable performance, smooth operation, and efficiency for today’s heavy-duty highway trucks. With a proven 10-speed overdrive design, a durable construction, and a user-friendly layout, it offers an excellent combination of power, control, and fuel economy. For fleets and drivers looking for simplicity without compromising capability, the FRO-16210C is a trusted choice in the commercial trucking world.

Technical Specifications:

• Model: FRO-16210C
• Speeds: 10 forward, 2 reverse
• Type: Manual, constant mesh
• Input Torque Capacity: 1,600 lb-ft (2,170 Nm)
• Horsepower Capacity: Up to 500 HP
• Input Shaft Diameter: 1.75 inches
• Input Shaft Spline Count: 10-spline
• Weight (dry): Approximately 587 lbs (266 kg)
• Oil Capacity: 28 pints (13.2 liters)
• Lubricant Type: Eaton Roadranger-approved synthetic transmission fluid
• Clutch Type: Compatible with 14-inch pull-type clutches
• Housing Material: Aluminum alloy (for weight savings and corrosion resistance)
• PTO Ports: Two (left and right sides)
• Mounting: Standard SAE #1 bell housing

Gear Ratios

The FRO-16210C offers a wide spread of gear ratios designed to deliver strong startability while maintaining excellent fuel economy at cruising speeds.

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

This gear layout provides a broad ratio coverage for pulling heavy loads from a stop, climbing grades, and maintaining low engine RPMs during highway cruising to save fuel and reduce engine wear.

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