Description

Dana Spicer T210, CM55 1991 Parts Catalog

If you’re tearing down a T210 or CM55 transmission without this 1991 Parts Catalog on your bench, you’re gambling with your rebuild. I’ve seen guys order the wrong mainshaft because they guessed at the bearing cap chart. That mistake costs a week of downtime. This is the factory Spicer document – 79 pages of exploded diagrams, ratio tables, and supersession data that the Dana dealer still pulls from. You need the exact part number for a drive gear bearing cap? It’s in here. You need to know if your CM55 uses the 7.15 or 6.56 first gear? See page 1 of the ratio table. No guesswork.

Model Identification and Ratio Table

Page 1 starts with the ratio table and identification. The name plate (NP-96) on the left side of the transmission tells you the serial, B/M No., and model. Abbreviations like N.S. (Not Shown) and N.S.S. (Not Sold Separately) are explained right there. The ratio table covers models 5552-A through 5852-A with 1st through 5th gear ratios. For example, model 5552-A has a 7.15 first and a 1.00 fifth. This isn’t something you can reverse-engineer from a generic parts website – these are verified factory numbers from Dana Spicer. If you’re mixing a CM55 with an older T210 case, you need this page to confirm your gear set matches.

Gears and Related Parts: The Core of the Transmission

Sections 2 through 5 cover the drive gear group, mainshaft group, countershaft group, and reverse idler group. Each group has its own exploded diagram and parts list. The drive gear group (page 2) includes the bearing, seal, and gear itself. The mainshaft group (pages 2-3) lists every bearing, spacer, and snap ring. If you’re doing a full overhaul, you’ll reference these pages to order the correct mainshaft rear bearing cap – that cap chart lives on pages 10-12. I’ve seen aftermarket catalogs lump these parts together incorrectly. This factory manual splits them by functional group so you don’t order a countershaft bearing when you need a mainshaft one.

Case Group and Shifter Housing: What to Watch

Pages 8-13 cover the case group and related parts: drive gear bearing cap, clutch housing, mainshaft rear bearing cap, and countershaft rear bearing cap. The clutch housing dimensions on page 13 matter if you’re replacing the housing or checking for wear. The shifter housing assembly (pages 14-15) and remote control assembly (pages 16-18) show the shift lever and code assembly. These are common failure points – the detent springs wear, and you’ll need the exact part number from this catalog. One of my techs tried to use a generic shifter boot from a parts store; it didn’t seal and we got gear oil all over the shop floor.

Overhaul Kits: Major vs. Minor

Pages 22-23 list the official overhaul kits – major and minor. A minor kit includes gaskets, seals, and snap rings. A major kit adds the bearings. If you order the wrong kit, you’ll be missing the reverse idler thrust washer. The tabulated bills of material (pages 24-67) give you every part number organized by assembly. This section alone justifies owning the catalog. You can cross-reference your old part numbers against the supersession list (pages 68-77) which covers CM50 to ES60-S changes. For example, if you have a CM55 and need a part that was used on the older CM50, this list shows the replacement part number. Don’t rely on internet forums for supersession data – they’re often wrong.

Supersession and Replacement List: CM50 to ES60-S

The last ten pages (68-77) contain the supersession and replacement list. This is critical if you’re dealing with a transmission that’s been rebuilt before or if you’re swapping a newer transmission into an older vehicle. The list maps obsolete part numbers from the CM50, CM55, and early T210 series to the current ES60-S parts. I’ve had to use this list to find a replacement for a discontinued drive gear bearing cap – it saved me three hours of phone calls.

Does This Catalog Cover the Fuel System?

No. This is a parts catalog for the main transmission only. It does not cover the engine, fuel system, or clutch (aside from the clutch release and code table on pages 20-21). If you need engine specs, check our Internal Combustion Engine resource. For related transmission documentation, see the Dana Spicer ES42-5 1990 Parts Catalog – OEM Factory Specs or the Spicer T20000 Series Transmission Parts Overview. For the CM49 series, we have the Spicer CM49 Series Transmission Parts List T210-CM49.

This catalog is the real deal – original Dana Spicer factory print from 1991, not a third-party recompilation. Every page matches the OEM binder. The Automotive Industry Overview might give you background on drivetrain evolution, but for practical transmission work, this is your only source for accurate part numbers.

Can I use this catalog for a Spicer CM50 transmission?

Yes, but only for cross-reference. The supersession list (pages 68-77) includes CM50 parts that were replaced by CM55 or later ES60-S parts. The exploded diagrams are specific to CM55 and T210 models, so you cannot use them directly for a CM50 overhaul.

What’s the difference between the 1982 and 1991 editions?

The 1991 edition adds the supersession list for CM50 to ES60-S, updates the ratio table to include the 5852-A model, and corrects several bearing part numbers. If you have the 1982 version, replace it with this 1991 catalog – the older one has obsolete part numbers that will get you the wrong bearings.

Don’t guess your way through a transmission rebuild. One wrong snap ring can lock up a countershaft. Access the Factory Manual – it’s the only way to get every part number, ratio, and supersession straight from Dana Spicer.