2016 Kenworth W900 Transmission & Axle Gear Ratios
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Transmission gear ratios
For 2016, the Kenworth W900 was a workhorse, and as such, it offered a wide array of transmission options to suit various operational needs. The most common transmissions included Eaton Fuller’s manual heavy-duty truck transmissions. Due to the highly customizable nature of the W900, the exact 1st through Nth gear ratios could vary significantly based on the specific transmission model and its intended application (e.g., line-haul, heavy-haul, vocational).
Here are representative gear ratios for some commonly found Eaton Fuller transmissions in 2016 Kenworth W900 trucks. Please note that these are examples, and specific truck configurations should always be verified with the truck's build sheet or VIN decoder.
Eaton Fuller RTLO-18918B (18-Speed Manual)
This 18-speed manual transmission is a popular choice for heavy-duty applications, offering a wide ratio spread for excellent startability and highway cruising.
| Gear | Ratio |
|---|---|
| 1st | 14.40 |
| 2nd | 12.01 |
| 3rd | 10.00 |
| 4th | 8.35 |
| 5th | 6.97 |
| 6th | 5.82 |
| 7th | 4.85 |
| 8th | 4.04 |
| 9th | 3.38 |
| 10th | 2.82 |
| 11th | 2.35 |
| 12th | 1.96 |
| 13th | 1.64 |
| 14th | 1.37 |
| 15th | 1.15 |
| 16th | 1.00 |
| 17th (OD) | 0.86 |
| 18th (OD) | 0.73 |
| Reverse | 14.93 / 3.48 |
Eaton Fuller FRO-16210C (10-Speed Manual)
A common 10-speed option suitable for many line-haul applications, offering a good balance of performance and efficiency.
| Gear | Ratio |
|---|---|
| 1st | 11.72 |
| 2nd | 8.86 |
| 3rd | 6.58 |
| 4th | 4.96 |
| 5th | 3.71 |
| 6th | 2.79 |
| 7th | 2.08 |
| 8th | 1.57 |
| 9th | 1.17 |
| 10th (OD) | 0.86 |
| Reverse | 12.01 |
Available axle ratios
Axle ratios for the 2016 Kenworth W900 were as diverse as its transmission options, allowing buyers to finely tune their trucks for specific operations. Common axle manufacturers included Meritor and Dana Spicer. The range of available ratios typically catered to everything from fuel-efficient highway cruising to severe-duty heavy hauling.
Here are some common axle ratios that could be found on a 2016 Kenworth W900:
| Ratio | Available With (engine/trim/package) | RPO/Axle Code | Best For |
|---|---|---|---|
| 2.64 | PACCAR MX-13 / Cummins ISX15 (eco packages) | Various | Fuel Economy (light load line-haul) |
| 2.79 | PACCAR MX-13 / Cummins ISX15 | Various | Fuel Economy (balanced line-haul) |
| 3.08 | PACCAR MX-13 / Cummins ISX15 | Various | Balanced (line-haul, some regional) |
| 3.25 | PACCAR MX-13 / Cummins ISX15 | Various | Balanced (regional, some heavy-haul) |
| 3.42 | PACCAR MX-13 / Cummins ISX15 | Various | Towing (medium-heavy haul) |
| 3.55 | PACCAR MX-13 / Cummins ISX15 / vocational packages | Various | Towing (heavy haul, vocational) |
| 3.70 | PACCAR MX-13 / Cummins ISX15 / vocational/super heavy-haul packages | Various | Towing (severe heavy-haul, off-road) |
| 3.90 | PACCAR MX-13 / Cummins ISX15 / vocational/super heavy-haul packages | Various | Towing (extreme heavy-haul, specialized) |
How to identify your axle ratio
Identifying the correct axle ratio is crucial for maintenance, repairs, and understanding your truck's performance characteristics. Here
More specs for the 2016 Kenworth W900
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2016 Kenworth W900 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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