[Ashley P]

I'm learning about a dt466 and swapping from the MT545 Allison to a manual trans. I think I've learned that medium/heavy duty engines use different sized "clutch housings" to mate to different sized "flywheel housings". These housings are categorized by SAE numbers. I think the MT545 mates to an SAE #3. I found a local 10 speed, a Meritor MO16G10CM16053 for sale. It's probably a #1.

Does anyone know way more about this than I do? Could you teach me?

Would anyone have link to gear ratios for the above transmission?

(I've googled 'till I'm cross-eyed and confused.)

[Keith Seymore]

I'm on a couple truck forums where they might be more knowledgeable.

https://67-72chevytrucks.com/vboard/index.php

https://www.gmsquarebody.com/

You might try asking your questions there.

K

[Ashley P]

FWIW, I found enough info online that I managed to call a truck salvage/repair yard with reasonably intelligent questions. The DT466 started as purely mechanical, then went to HEUI around 1995. Like some auto makers, the old stuff carried on for a while, yet it had some newer upgrades. My engine is a 1996 dt466 NGD, and is a purely mechanical engine, yet has the newer HEUI style flywheel housing and flywheel bolt pattern.

If anybody needs to cram one into a Pontiac, you can ask me for more details. (466 CID, turbocharged, and came under a one piece fiberglass tilt front cap. Sounds cooler than a school bus if I say it like that, huh?)