Description

Roadranger RTLO-14918B 2011 Parts Catalog

You ever order a part for an RTLO-14918B and get the wrong one? I have. Wastes a day, ties up a bay, and the customer’s truck sits. That’s why I keep the factory parts catalog within arm’s reach. This is the Roadranger RTLO-14918B 2011 Parts Catalog – 36 pages of OEM part numbers, exploded diagrams, and revision levels. Not aftermarket guesswork. Not a reprint from some third party. This is the document the dealer’s parts counter uses. If you’re rebuilding an auxiliary drive or tracking down a range cylinder seal, this is where you start.

How to Use the Illustrated Parts List – Page 3

Page 3 lays out the whole system: part numbers, reference numbers, quantities per assembly. Each section in the table of contents points you straight to the right page. Need a mainshaft synchro assembly? Flip to page 24 (Mainshaft Assy). No scrolling through generic online catalogs that list the wrong year variant. This manual tells you exactly which part fits the RTLO-14918B as built in July 2011. The illustrated parts list uses standard Eaton/Roadranger notation – once you learn it, you can find any part in under 30 seconds.

Auxiliary Drive Gear and Input Shaft – Sections 4 and 15

The auxiliary drive gear section (page 4) lists the gear, bearings, and snap rings with OEM numbers. The input shaft and drive gear section (page 15) covers the same for the front end. If you’ve ever tried to order an input shaft from a parts house that read “fits 1995-2010” and got the wrong spline count, you’ll appreciate having the factory drawing number. Cross-reference the part number against your old part before you order. That saves you the restocking fee and the wait.

Case (AUX) and Case (Front) – Key Differences on Pages 5 and 7

Two different case assemblies. The auxiliary case (page 5) holds the range cylinder and isolators. The front case (page 7) has the integral oil pump pickup and heat exchanger ports. Mixing them up means an oil leak or a misaligned bore. The parts catalog gives you the exact fastener torque callouts in the footnotes – those are factory specs, not aftermarket approximations. Page 7 lists the front case with the correct stud lengths. Use that. Don’t guess.

Skip the aftermarket parts lists. They cost you time and money.

Filter Regulator, H & C W/A-5000 Valve, and Oil Cooler – Pages 11, 12, 26

Three sections that separate a working transmission from a 30-minute diagnostic hunt. The filter regulator assembly (page 11) includes the cartridge, o-rings, and mounting bracket. The H & C W/A-5000 valve (page 12) is the shift valve for high/low range – it has a specific spring and plunger. If you rebuild it with generic parts from a kit that “fits most Eaton 18-speeds,” you’ll get a shift hang. The oil cooler section (page 26) lists the coolant fittings and core part numbers. When a customer comes in with a transmission that runs hot, you check the cooler bypass first – and this page tells you if you need the straight or 90-degree adapter.

Kits & Assemblies – Why You Need the Exact Part Number on Page 19

Parts catalogs are only as good as the kit numbers. Page 19 of this Roadranger document lists overhaul kits, gasket sets, and sub-assemblies. A general “transmission overhaul gasket set” might omit the auxiliary synchro seals or the isolator grommets. This catalog breaks it down by functional group – Levers/Housings (page 21), Mainshaft & Synchro(Aux) (page 23), Reverse Idler (page 29). If you’re doing a full rebuild, write down every part number from the relevant sections before you call the wholesaler. It saves the “I need one more o-ring” trip.

Source Validity – OEM Reference, Not Aftermarket Reprint

This is a genuine Roadranger factory parts catalog, published July 2011. It’s an original print scan, not a third-party compilation that reprints the same generic parts list for a dozen different models. The difference? The OEM catalog includes supersession notes and revision letters. Aftermarket catalogs often drop the footnotes that tell you “Part A supersedes Part B for serial number range S/N 123456 and up.” That footnote is the difference between a part that fits and one that doesn’t. I’ve watched guys install a filter regulator from an aftermarket list, only to have it leak because the o-ring groove changed in late 2010. This catalog catches that. For other Roadranger transmissions, check the Roadranger RTLO-18918B-T2 2011 Parts Catalog or the Roadranger RTLO-14613B 2011 Illustrated Parts List. The Roadranger RT-8608L 2011 Parts Catalog covers a different lineage but uses the same numbering system. For a broader look at how these transmissions integrate with the drivetrain, the Automotive Industry Overview discusses heavy-duty transmission evolution, and the Internal Combustion Engine page gives context on engine-transmission matching. But for the parts themselves, this catalog is the final word.

Does this catalog include torque specs or repair procedures?

No. This is a parts catalog, not a service manual. It lists part numbers, quantities, and illustrations. Torque values and assembly steps are not included. You need the factory service manual for that.

Can I use this to rebuild my RTLO-14918B transmission?

You can use it to identify every part you need for a rebuild. The exploded diagrams show how the assemblies go together, but the catalog does not give clearance specs, wear limits, or installation instructions. I keep this catalog open on one side of the bench and a service manual on the other. For bearings and synchro rings, you must check the service manual for acceptable wear. The parts catalog will tell you what the original part number is, but if a part has been updated via a factory recall, you might need a service bulletin. That said, for sourcing the correct components – especially for the integral oil pump (page 16) and the range cylinder (page 28) – this catalog is indispensable.

What transmission models does this catalog cover?

This catalog is specific to the Roadranger RTLO-14918B. It does not cover the RTLO-18918B or RTLO-14613B, though those share many internal parts. If you need parts for a different model, see the related catalogs listed above.

Is this a digital access or a physical book?

It is a digital PDF format. You get the full 36-page factory document as scanned from the original print. No reprint, no watermark. You can print it, zoom in on the illustrations, and search for part numbers.

If you work on these transmissions, you need the factory documentation. A generic parts list from a forum will eventually steer you wrong. Access the Factory Manual and keep it on the shop tablet. When that next RTLO-14918B rolls in with a stripped aux housing bolt, you’ll have the right part number in seconds. That’s the difference between a job that pays and a job that eats your profit.