Description

Transmission Technologies CM40 2000 Parts Catalog – What a Working Mechanic Needs

I’ve spent more hours than I care to count chasing wrong part numbers from generic catalogs. You order a synchro ring, get a box with a part that doesn’t match the tooth count, and the truck sits another day. That’s lost money. When you’re inside a CM40 transmission, guessing isn’t an option – the tolerances are tight, the shift forks need the right length, and the clutch housing dimensions must match the bellhousing. This is where the factory Transmission Technologies CM40 2000 Parts Catalog earns its spot on your bench. It’s 28 pages of page‑1 ratio tables and page‑9 rear bearing cap charts with brake applications – the kind of data that stops you from ordering the wrong drive gear bearing cap.

CM40 Parts Catalog – What You Actually Get

This isn’t a service manual with torque specs. It’s a parts catalog – and that distinction matters. The table of contents walks you through every major assembly: Gears and Related Parts (pages 2‑5), Clutch Housing & Drive Gear Bearing Cap Group (6‑7), Case Group (8), Rear Bearing Cap Chart with Brake Applications (9), Rearing Cap Group and Related Parts (10‑11), Remote Control Assembly (12), Shift Lever and Dome Assembly (13), Shift Bar and Fork Assembly (14), End Yokes (15), Clutch Release Code Table (16‑17), Drive Gear Bearing Cap Chart with Clutch Application (18), Clutch Housing Dimensions (19), Overhaul Kits – Major and Minor (20‑21), and Tabulated Bills of Materials (22‑27). Each section uses one exploded‑view drawing and a numbered parts list with OEM part numbers. You match the number, you get the right piece. No cross‑referencing three different aftermarket databases.

And don’t overlook the Ratio Table on page 1. It lists the 4054‑A and 4054‑D models: 1st gear 7.22, 2nd 5.86 or 3.88 depending on the speed, 3rd 2.21, 4th 1.00, reverse 7.22. If you’re rebuilding a CM40 that needs the correct countershaft set, that ratio tells you which part group to pull.

Gears and Related Parts – Drive, Mainshaft, Countershaft

Five pages covering the gear train. Drive gear group (pages 2‑3) includes the input shaft, drive gear, and bearing assemblies. Mainshaft group (pages 2‑3) lists the mainshaft, sliding clutch, and speed gears. Countershaft group (pages 3‑5) gives you the countershaft, reverse gear, and idler parts. Each line item has a reference number that ties back to the drawing. If the drawing shows item B‑7 and the list says B‑7 is a mainshaft drive gear with a specific tooth count, you know what to order. No more “looks about right” parts ordering.

Reverse Idler Shaft Group (pages 4‑5) and the separate Reverse Gear Table on page 5 save you from ordering the wrong idler gear when the reverse ratio is the same as 1st. That overlap can trick you if you’re not using factory documentation.

Clutch Housing and Case Group – Why Dimensions Matter

Clutch housing dimensions are listed on page 19. That’s the kind of data that aftermarket catalogs often omit or fudge. You get the bolt pattern, the pilot bore depth, and the SAE housing size. If you’re mating a different clutch or a different bellhousing, that page is your sanity check. The Clutch Release Code Table on pages 16‑17 cross‑references release fingers, bearing part numbers, and clutch applications. Use it to match the clutch fork to the correct release bearing before you drop the transmission back in.

The Case Group (page 8) shows the transmission case, rear bearing cap, and mounting hardware. Part numbers for the case itself, the oil fill plug, the magnet – all factory‑sourced. No guessing whether a bolt is M12 or M14.

Overhaul Kits and Tabulated Bills of Materials

Pages 20‑21 list major and minor overhaul kits. A major kit typically includes gaskets, seals, snap rings, and the synchronizer rings. A minor kit might omit the gears. The Tabulated Bills of Materials (pages 22‑27) break down every single part number used in the transmission. If you need a bearing cap gasket, you can cross‑check the B/M number against the serial number on the nameplate. That nameplate (NP‑95) is riveted to the right side of the transmission – stamped with the B/M number and model. Always read it before ordering.

Is This the Right Parts Catalog for Your CM40?

If you’re working on any CM40 variant – 4054‑A, 4054‑D, or a special configuration – this catalog covers it. It’s designed for Transmission Technologies transmissions used in medium‑duty trucks, school buses, and industrial equipment. The Automotive Transmission sidebar on the nameplate tells you the application. If you need service procedures (disassembly, tolerances, torque specs), that’s a different book. For correct part numbers, this is the only source that matters.

If you’re also maintaining other TTC models, check the related manuals: Transmission Technologies PS 140-7A, PS 125-7B Service Manual – OEM, PS105-7LL, 9505-2A, PS130-6L, 9505-2B Service Manual (2000), and ES65-5, CM50 Transmission Service Manual. Each covers the service side – torque specs, clearances, overhaul steps. Pair them with this parts catalog and you’ve got the full picture.

Factory Source vs. Aftermarket Reproductions

I’ll put it bluntly: aftermarket parts catalogs are often scanned from a beat‑up copy, then re‑watermarked and missing half the illustrations. This PDF is the original factory print – Bulletin No. T210‑CM40‑1, dated March 2000, published by Transmission Technologies Corporation. The text reads “LITHO IN U.S.A.” on page 1. You get the exploded‑view drawings with clear part callouts, the Ratio Table, the Clutch Release Code Table – everything exactly as the factory shipped it. No reinterpretation. No guesses. If a part is “N.S.S.” (Not Sold Separately), the catalog says so. If it’s “N.R.” (Not Required), it lists it. You don’t get that level of honesty from a third‑party reprint.

The Manual Transmission world relies on accurate part numbers. One wrong input shaft bearing and you’re pulling the transmission again. This catalog cuts that risk. And it’s only 28 pages – compact enough to print and stick in a binder, but dense enough to cover every nut and washer on a 4054‑D.

Does this catalog include torque specifications?

No. This is a parts catalog, not a service manual. It lists part numbers, ratios, and dimensions. For torque specs you need the CM40 service manual.

Are the part numbers still current for 2025?

Some numbers may have been superseded. Transmission Technologies (TTC) still supports many of these transmissions. Use the B/M number or serial to verify current availability.

Can I use this PDF on my phone at the bench?

Yes. The PDF is searchable. Zoom into the drawings to read part reference numbers. I keep it on a tablet with a fluids‑resistant case – works fine.

Does the catalog cover the 4054‑A and 4054‑D models?

It covers both. The Ratio Table on page 1 lists both models. The drawings refer to “CM40” generically. Check the nameplate for your specific B/M number to confirm compatibility.

You’ve got two choices: keep ordering parts by guessing from generic catalogs and eating the return shipping, or get the 28‑page factory document that lists every part with a reference number. Access the Factory Manual now and put the right part in your hand the first time.