Description

Roadranger Spicer Axle, Fuller Transmission, Eaton Hybrid Power, Bendix Brake 2008 Technical Manual

I’ve seen guys waste an afternoon because some aftermarket PDF told them 250 ft-lbs on a Spicer pinion nut. That nut is 350 ft-lbs on a DS404 axle. This 56-page Roadranger Spicer Axle, Fuller Transmission, Eaton Hybrid Power, Bendix Brake 2008 Technical Manual is what the factory ships to dealers. No speculation. The 2008 specifications guide covers the exact values you need. Page 2 spells out the five value pillars – reliability, low maintenance, driver benefits, safety, support – that Dana and Eaton built the Roadranger system around. That’s not marketing fluff; that’s engineering intent.

If you’re a DIY owner-operator or a shop tech working on a Class 8 truck, you need the numbers this thing holds. The OEM torque specs for Spicer differentials, the lube capacities for Fuller transmissions, the pressure settings for Eaton Hybrid Power inverters, and the chamber stroke limits for Bendix brakes. All in a 56-page booklet that fits in a glovebox. I keep one in my toolbox drawer. When a driver says his UltraShift won’t shift, I flip to page 10 for the transmission overview before I disconnect anything.

VORAD Collision Warning System: Factory Specifications

Page 47 covers the VORAD system – Bendix radar-based collision warning. The manual lists sensor mounting heights, alignment tolerances, and system test procedures. Aftermarket sources love to tell you to “adjust the sensor until it beeps right.” That gets you a false alarm or a missed detection. The factory spec gives you a 0.5-degree vertical tolerance. Without that, you’re guessing. I’ve seen a guy drill new holes in a bracket because he didn’t have the spec. Cost him three hours. This manual gives you the exact millimeter positions. That’s not opinion; that’s print.

What Does Page 24 Tell You About Clutch Adjustment?

Page 24 covers heavy- and medium-duty clutches. The Fuller Solo self-adjusting clutch saves money, but only if the release bearing clearance is set right. The manual lists the clutch brake clearance and the pedal free play range for Solo and non-Solo units. One number wrong and the clutch drags or the brake wears out in 20,000 miles. I use the spec from this guide, not the greasy note from the last guy.

5 Value Pillars Behind the Roadranger System

Reliability – Spicer drive axles for line-haul have the longest standard warranties in the industry, according to page 2. Low maintenance – Fuller Solo clutch self-adjusting design can save over $1,000 over the clutch life. Driver benefits – torsionally-tuned tandem drive axles smooth the ride. Safety – VORAD collision warning systems reduce accidents 35 to 100% with payback under a year. Support – over 150 Roadranger consultants across North America, backed by a call center and roadranger.com. These pillars aren’t marketing; they’re the reason this guide exists. Every spec in here supports those goals.

Check the Transmission Specs Before You Rebuild

Whether you’re working on a Fuller RTLO manual or an UltraShift automated, the gear ratios, shift points, and lubricant grades are all here. Page 6 starts general transmission information. For heavy-duty automated linehaul, see page 10. Heavy-duty multi-purpose automated, page 12. Heavy-duty manual, page 14. Medium-duty automated, page 22. The manual breaks it down by application. If you’re pulling a transmission without the shift housing torque spec, you’re rolling dice on a $3,000 part. I’ve seen the aftermath of a pinion nut that was 50 ft-lbs off. Not pretty.

Eaton Hybrid Power: What the 2008 Manual Contains

Eaton’s Hybrid Power system is covered in its own section. The 2008 guide lists the motor torque specs, battery pack voltage limits, and inverter coolant requirements. Aftermarket manuals omit hybrid safety procedures – the high-voltage disconnect sequence, the lockout/tagout steps. This manual includes them. Page references? The hybrid section follows the transmission chapters. If you’re servicing a hybrid drivetrain without the factory hybrid power data, you’re a liability. Don’t be that guy.

Why the Roadranger Call Center and 150+ Consultants Matter

This manual is the condensed version of what those 150 drivetrain consultants carry. The Roadranger system is a joint venture between Dana and Eaton – that means the Spicer axle specs and the Fuller transmission specs come from one source. Aftermarket manuals mix up threads from different manufacturers. One aftermarket manual told me to use 75W-90 in a Fuller transmission that calls for 50W synthetic. This guide says 50W. Page 14 of the transmission section lists the approved oils. Don’t trust a third-party reprint. The original OEM document is what you get here. No reprints. No copies. That’s the difference between a blown seal and a proper fit.

For parts breakdowns on specific models, pair this guide with a matching illustrated parts catalog. For the RTLO-14918B, grab the Roadranger RTLO-14918B 2011 Parts Catalog – OEM Factory Document”>Roadranger RTLO-14918B 2011 Parts Catalog – OEM Factory Document. The Roadranger RTLO-18918B-T2 2011 Parts Catalog”>Roadranger RTLO-18918B-T2 2011 Parts Catalog covers that variant, and the Roadranger RTLO-14613B 2011 Illustrated Parts List”>Roadranger RTLO-14613B 2011 Illustrated Parts List handles the 13-speed. If you need background on Manual Transmission”>Manual Transmission theory, Wikipedia is a start – but for factory assembly specs, this manual is the source. Same for Manual Transmission”>Manual Transmission maintenance intervals: this document lists them by model.

Frequently Asked Questions

Is this manual specific to 2008 models only?

Yes. It covers 2008-09 model year specifications.

Does it cover both heavy-duty and medium-duty transmissions?

Yes. The manual includes sections for heavy-duty linehaul automated transmissions (page 10), heavy-duty multi-purpose automated (page 12), heavy-duty manual (page 14), and medium-duty automated (page 22). Additionally, the clutch section on page 24 covers both heavy- and medium-duty clutches, with adjustment specs and torque values. The transmission information pages also list lubricant capacities and type recommendations for each model series, so you can service a Fuller RTLO or an UltraShift with the correct oil. That level of detail is why I don’t use aftermarket guides.

Are wiring diagrams included?

No, this is a specifications guide, not a wiring diagram manual.

How do I know the torque specs are OEM?

Every spec in this manual comes from Dana and Eaton’s engineering departments. The Roadranger system was developed jointly by those two OEMs, and this guide is their official publication. No aftermarket reproduction. That means the axle ratios, transmission gear counts, hybrid power voltage ratings, and brake chamber pressures are exactly what the factory uses. That’s why I trust it in my shop.

I’ve been turning wrenches for 28 years. I’ve seen manuals that skip the torque spec for a wheel bearing adjustment and say “tighten until snug.” That’s not a spec – that’s a lawsuit waiting to happen. This Roadranger manual gives you the exact numbers from the people who designed the parts. If you want to work with the same data the dealers use, access the factory manual from AutoRepairManuals.