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So my 72 is non lock up trans, but if the truck one ends up being a lock up trans as long as I use the converter out of the truck as well I'm ok? Thanks this is really helpful



Maybe.

Depends on what engine is in front of the 904, 318 in both then yes. I'll assume it's a V8 here, I suppose it could be a slant 6 in both.

They make 904 type transmissions till 89 in the M bodies,





you wont really know till you pull it out and ID it...72 could of had a trans replaced with anything by 2013.

post the # along the edge of trans pan rail from driver side..this will tell what yr the case is. but agian, many things could have been done to it since then on the inside.