Description

Dana Spicer 7041 1978 Parts Catalog

If you’ve ever tried to order parts for an old Dana Spicer auxiliary transmission by guessing at wear items, you know the pain. One wrong bearing and you’re tearing it back down. This Dana Spicer 7041 1978 Parts Catalog kills that guesswork. It’s the original factory document – 13 pages of exploded views and part numbers that match exactly what came off the line. No aftermarket re-indexing. No third-party rewrites. Just the parts list Dana’s engineers intended.

Model 7041 T210-61: Gears and Related Parts

Page 1 opens with the drive gear group. You get the exact part numbers for the input kit (311612X), the drive gear (500898 with 1-1/4 inch hex), and the nut (60-70070 for Ford applications). The mainshaft group on page 2 lists everything from the mainshaft kit (311611X) through the 2nd, 3rd, and 1st speed gears with tooth counts – 36T, 39T, 37T – so you can verify you’re ordering the right ratio. Countershaft group C covers the 28T, 34T, 31T gears and all six Woodruff keys (500010-8 #25). If you need the needle bearing for first gear, it’s B-13, part 330504. The catalog gives you the exact quantity required per assembly. That’s what you need on the bench, not a vague “kit includes necessary components.”

Bearing Caps and Related Parts: Single vs Two-Piece

Page 3 shows the critical difference in bearing cap design for the 7041. Old cases used a single-piece cap; new cases can use either single or two-piece, but only if the oil passage is provided through the case. The note on page 3 is worth memorizing: “On an old case, the old single-piece bearing cap must be used for proper lubrication of the countershaft bearing.” If you swap caps without checking, you’ll starve that bearing. Page 4 lists the gasket (60-223-25) and the cap, breather & oil seal assembly (311515X). Don’t order a two-piece cap for a vintage unit unless you confirm the case has the oil passage.

Workbench Use of This Parts Catalog

This isn’t a repair manual – it’s a parts identification document. But if you’re rebuilding a Dana Spicer 7041, you need this open next to the bench. Lay out your old parts, match the reference numbers (A-1, B-4, C-3) to the exploded view, then order by the part number in the “Part No.” column. No cross-referencing to aftermarket catalogs. No digging through online forums. Every fastener, washer, bearing, and gear is here. The catalog also indicates “N.S.S.” (Not Sold Separately) for assemblies that come only as a kit – for example, the drive gear & input kit A-1 (311612X). Saves you from ordering individual items that aren’t available alone.

Why OEM Beats Aftermarket for Parts Identification

I’ve seen aftermarket parts catalogs list the wrong snap ring for a countershaft gear because they compressed several years into one page. This Dana Spicer 7041 1978 Parts Catalog came straight from the factory. The snap rings callouts (C-5 60-381-8, C-7 60-381-1) are specific to this model and build year. An aftermarket “universal” list might give you a ring that fits diameter but wrong thickness – leads to gear walk. You don’t get that with original OEM prints. Need the companion flange or yoke? “See Tab Bills” means you order by application, not a generic number. That level of accuracy keeps your rebuild from turning into a parts return circus. For the service manual that goes with this unit, check the Spicer 7041 Model 4-Speed Auxiliary Transmission Service Manual. For other Dana Spicer industrial catalogs, see Dana Spicer ES42-5 1990 Parts Catalog – OEM Factory Specs and Dana Spicer T20000 2005 Parts Catalog – OEM Factory Specs. For broader context on drivetrain systems, the Automotive Industry Overview covers auxiliary transmission history, and the Internal Combustion Engine topic explains why gear ratios matter.

Safety and Accuracy on the Bench

Even a parts catalog carries safety implications. Wrong bearings cause heat buildup. Wrong snap rings let gears float and friction weld. This 1978 Dana Spicer paper gives you the correct part dimensions so you don’t guess. Always verify the part physically before installation, but start with the factory number. If you’re pulling a 7041 out of a truck that’s been sitting 30 years, the old parts may have rust or wear that makes measurement tricky – the catalog gives you the as-built specs.

FAQ

Does this catalog include torque specs for assembly?

No. This is a parts catalog, not a service manual. It lists part numbers and quantities only. For torque values and assembly procedures, use the separate service manual.

Can I use this PDF to order parts online?

Yes. Match the part number from the “Part No.” column exactly as printed. Note that some parts are marked N.S.S. (Not Sold Separately) and must be ordered as a kit. Page 2 lists the kit numbers for drive gear and mainshaft groups.

What years does this catalog cover for the 7041?

The publication year is 1978. It covers the Model 7041 4-speed auxiliary transmission with the T210-61 gear configuration. If your transmission has a different serial number prefix, verify compatibility using the service manual.

Why are there two different part numbers for the drive gear nut (A-3)?

One nut (60-70070) is for Ford applications with 2-1/4 inch split hex; the other (600713) is a solid hex across flats. The catalog shows both so you order the correct one for your yoke or companion flange. This is exactly why you need the OEM catalog – a generic list would omit the application detail.

This 13-page document is the last word on what goes inside a Dana Spicer 7041 auxiliary transmission. Skip the aftermarket guesswork. Access the Factory Manual from AutoRepairManuals and keep it on your tablet or printed out. Your transmission – and your wallet – will thank you.