A904 differences 1971-1972

[67Charger]

What's the short version of the differences between a 71 and 72 A904? I need to do a light duty rebuild on a 904 to get my car mobile. I don't know what it came from, but it is non-lockup, looks virgin, and the casting date on the tail shaft is about Aug of '71, which leads me to believe it was a '72 model. I didn't think to get the number off the pan rail this morning. Regardless, I am still curious what the differences are since all the available rebuild kits draw a hard line between 71 and 72.

 

[pnora]

Its been a while but as I remember there were some clutch piston seal changes. As I recall most kits came with both styles. Other than that I do not think there is much more.

 

[pnora]

727 was no different as they had split years like the 904. Having the numbers can help get the right kit. However if it was ever re-manufactured there can be different internals. I just looked and I see the kit changes. When I did them like I said the kits we used covered most all applications. If there was a small steel ring or seal I had tons of them saved as with wvery job there were unused parts. There may be different bands but if anything has been changed there could be something different. You might call and ask. They might offer what it takes for either model.

 

[67Charger]

I'll be getting the kit from Oregon transmission. I'll likely just ask for enough extra parts to make it truly universal and keep the spares for whatever ISN'T inside it. If it's just seals and stuff, it should be a small cost difference. Just making sure it wasn't the clutches or hard parts.

 

[pnora]

I'll be getting the kit from Oregon transmission. I'll likely just ask for enough extra parts to make it truly universal and keep the spares for whatever ISN'T inside it. If it's just seals and stuff, it should be a small cost difference. Just making sure it wasn't the clutches or hard parts.

That's what I think to be true. Just be safe and ask.