Description

Allison TC200, TC300, TC248 Parts Catalog

If you are ordering parts for an Allison Torqmatic converter and you hand me a part number you pulled off some third-party website, I am going to hand you back a bolt that doesn’t fit. This catalog—Allison TC200, TC300, TC248 Parts Catalog—is the only source I trust when I need to verify a seal, a bolt size, or a mounting plate variant. It’s 39 pages of factory-issued diagrams and part numbers, not some re-drawn sketch that misses a thread pitch. You get exploded views with reference numbers, group listings from A through E, and recommended spare quantities right there on the page. No guesswork. If you are maintaining a fleet of TC200 or TC300 converters, or you have a TC-248 sitting in the shop, this is the doc you pull open before you call your parts supplier.

What This Parts Catalog Covers

The catalog groups hardware by function. Group A is the oil cooler option (part number 6836686) – you get bolts, cover, gasket, core assembly, and the orifice plugs that differ between the TC200 (0.218 dia) and the TC300 (0.312 dia). Group B handles the cable drive adapter for accessory drive, option 6755877 – includes the adapter seal (0.50 ID) and shaft. Groups C, D, and E cover mounting plates: option 6757007 for converters prior to serial number 6482, option 6757009 for later units, and a separate mounting plate group specifically for the TC-248. Each section lists the required bolt count, lock washer sizes, and the exact part numbers for self-locking bolts like 9409227 (1/2-13 x 3 1/4). You do not need to eyeball fastener specs.

3 Differences Between a Parts Catalog and a Service Manual

First, a parts catalog does not tell you how to disassemble or torque anything. It gives you the part number for the gasket you just ripped. Second, you get exploded diagrams with reference numbers keyed to the parts list – a service manual rarely shows an exploded view of the cable drive adapter with the oil seal location. Third, this catalog includes recommended spare parts quantities for 1–3 units, 4–10 units, and 11–25 units. If your shop handles three TC200 rebuilds per week, the spares column tells you exactly how many gaskets to stock. No guessing.

TC-248 Mounting Plate: Why It Matters

Group E on page 2 is dedicated to the mounting plate for the TC-248. The part number is not the same as the TC200 plate, and the bolt pattern uses self-locking 1/2-13 x 3 1/4 bolts. If you try to bolt a TC-248 into a mount designed for a TC300, you will strip threads. The catalog gives you the correct plate part number and the required fasteners. That is the difference between a solid mount and a headache. Use this page before you order anything.

Recommended Spare Quantities? Page 2 Tells You

Flip to the table under Group A. It shows recommended spares for units 1–3, 4–10, and 11–25. For example, the oil cooler core assembly (part 8522609) – you need 0 spares for 1–3 units, 1 for 4–10, and 2 for 11–25. The gasket (6754314) – 1, 3, 10 respectively. That lets you order exactly what your workload demands. For a shop managing multiple converters, that saves a return trip to the supply house.

Does This Catalog Include Wiring or Torque Specs?

No. This is a parts catalog only. You will not find torque values for head bolts or wiring diagrams for the control harness. For those, you need the corresponding service manual. If you need the official Allison TC 200-300 TCA TCRD 200 1976 Parts Catalog”>Allison TC 200-300 TCA TCRD 200 1976 Parts Catalog or the Allison Torqmatic Series 200 & 300 Parts Catalog”>Allison Torqmatic Series 200 & 300 Parts Catalog, we carry those separately. This catalog is strictly for identifying and ordering the correct replacement parts. Cross-reference part numbers against the Allison Torqmatic Converters 200-300 Series Parts Catalog”>Allison Torqmatic Converters 200-300 Series Parts Catalog if you have a later revision.

If you are just getting into heavy-duty transmissions, read up on the Automotive Industry Overview”>Automotive Industry Overview or the basics of the Internal Combustion Engine”>Internal Combustion Engine to understand the context. But for the parts themselves, stick with the OEM document.

I have torqued more head bolts than most people have had hot meals, and I will tell you straight: aftermarket parts catalogs are full of errors. This factory print is the original Allison release. No one redrew the diagrams. No one guessed the thread pitch. You get the same document the dealer tech uses. If you are rebuilding a Torqmatic converter and you want to get the right oil cooler seal or the proper mounting plate for a TC-248, Access the Factory Manual – it will save you a return trip to the counter.

Frequently Asked Questions

How many pages is this parts catalog?

39 pages.

Does it cover the TC-248 model specifically?

Yes, Group E on page 2 is dedicated to the TC-248 mounting plate. It includes the correct plate part number and the self-locking bolts (1/2-13 x 3 1/4, part 9409227). The rest of the catalog covers common assemblies for the TC200 and TC300, but the TC-248 has its own mounting plate group separate from Groups C and D.

Can I use this catalog to rebuild a Torqmatic converter?

No. This is a parts identification catalog, not a service manual. You need the service manual for disassembly, inspection, and torque specs.

Are the part numbers still current or superseded?

Some may be superseded. This catalog gives you the original part numbers used at time of publication. Cross-reference with your local Allison dealer or current parts database. The catalog is still valuable for understanding the correct fastener sizes and assembly configurations.