Description

Eaton RT-8908LL 2006 Parts Catalog: What a Shop Needs

You’ve got a Roadranger RT-8908LL sitting on the lift, transmission tag is half-gone, and the parts guy on the phone wants a number you don’t have. I’ve been there. That’s why this Eaton RT-8908LL 2006 Parts Catalog earns a spot on my bench. It’s 36 pages of factory exploded views, part numbers, and assembly references — not a reprint, not a third-party interpretation. This is the OEM document Eaton released in September 2006.

Locating the Transmission Tag (Page 5)

If the tag is still on your RT-8908LL, page 5 shows exactly where to find it and how to read the model designation. The manual walks you through the nomenclature — RT means Roadranger, 8908 tells you the torque rating and speed count. This is the kind of detail aftermarket catalogs leave out. Use it to confirm you have the right transmission before you order a single part.

Auxiliary Drive Gear and Case Sections

Pages 6 through 10 cover the auxiliary drive gear and both case assemblies (auxiliary and front). These are the big chunks you don’t want to guess on. The exploded illustration shows every bushing, bearing, and fastener. Need the part number for the auxiliary countershaft bearing? Page 12. No flipping through generic sections — it’s laid out by sub-assembly exactly the way you pull it apart.

Does This Catalog Cover the Entire Transmission?

Yes, it covers the complete RT-8908LL transmission, but it’s a parts catalog, not a service manual. You get all the internal groups: countershaft assemblies (page 13), mainshaft and synchro (page 24), input shaft and drive gear (page 16), reverse idler (page 28), and the air system components — filter regulator (page 14), Roadranger valve, H & C W/A-5000 valve. It also includes the oil cooler (page 27) and integral oil pump (page 17). Every part number is keyed to an illustration.

Filter Regulator and Air System Diagrams

Page 14 shows the air filter/regulator assembly. If you’re chasing an air leak or a range-shift problem, you need the right o-ring and valve part numbers. The exploded view on page 15 covers the H & C valve. Third-party diagrams often miss the spring orientation — this one doesn’t. Follow the parts list exactly and you won’t end up with the wrong seal.

When to Use This Parts Catalog vs Aftermarket

I’ve seen aftermarket parts lists that combine two different Eaton models into one drawing. That’s how you order a mainshaft that doesn’t fit and lose a day. This 2006 catalog is specific to the RT-8908LL only. No cross-model mixing. The OEM torque values aren’t here — this is a parts catalog — but every number is traceable back to the Eaton engineering release. If you need torque specs, get the service manual. But for ordering parts, this is the document.

7 Key Sections in the Illustrated Parts List

• How To Use The Illustrated Parts List (page 4)
• Locating Transmission Tag (page 5)
• Combination Cylinder (page 11)
• Countershaft Assembly (page 13)
• Input Shaft & Drive Gear (page 16)
• Mainshaft Assembly (page 25)
• Kits & Assemblies (page 20)

Each section references the exact figure number. You match the callout on the drawing to the parts list table. That’s it. No translation work.

Related Manuals

• Eaton RTLO-16618A 2010 Parts Catalog – Factory Breakdown for Truck Shops”>Eaton RTLO-16618A 2010 Parts Catalog – Factory Breakdown for Truck Shops
• Eaton Roadranger RTXF Illustrated Parts List July 2011″>Eaton Roadranger RTXF Illustrated Parts List July 2011
• EATON Roadranger RTO-14908LL Illustrated Parts List”>EATON Roadranger RTO-14908LL Illustrated Parts List

For broader system context, see Automotive Industry Overview”>Automotive Industry Overview and Internal Combustion Engine”>Internal Combustion Engine background.

Frequently Asked Questions

Is this a service repair manual or a parts catalog?

Parts catalog only — exploded views and OEM part numbers.

What year does this catalog cover?

2006 release, specific to the Eaton RT-8908LL transmission.

How do I use the illustrated parts list on page 4?

Start by finding your transmission model on the tag (page 5). Then go to the section covering the assembly you need — for example, mainshaft is page 25. Each figure has callout numbers that match a table with the part number, description, and quantity. Order exactly what the table says. If the illustration shows a snap ring you don’t see on your unit, double-check the model number before ordering.

Does this include torque specifications or repair steps?

It does not. Torque values are in the service manual, not the parts catalog.

If you need to look up the correct part number for your Eaton RT-8908LL transmission, stop guessing and access the factory manual. That PDF on your screen saves you ordering the wrong mainshaft once — and it pays for itself.