727 trans

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dartlove

dartlove

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Hey guys I need your help. I picked up a 360 with tranny from a 78 diplomat
my problem is I cannot tell what size the tranny is. The #'s I found on driver side of housing are PK4028815 5904 341. I have looked at numerous sites and several threads and have come up with nothing. I was told it was a (a727), hopefully that is correct. Can anyone help with my odd dilema? Many thanks and lots of appreciation.
 
The # shows it is in fact a 78 transmission that was used behind a 360 according to this website

[ame]http://mymopar.com/downloads/transguide.pdf[/ame]

But as far as I can see it doesn't differentiate between 904 and 727. But all you have to do is look at the shape of the pan. Here's a couple pics of torqueflite pans. First pic is a 904. Second one is for a 727

I just noticed that at the very bottom of the page in the link it shows a bottom view of a 904 and 727.

BTW: unless your planning real high hp a 904 can take a lot of abuse so don't be dismayed if it's not a 727
 

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pans the key. 727 has a little "extra" on a corner, 904 doesnt. Now a 904/998/999 is another story. I know the lock up trans have a smooth "reservoir tip" on the input shaft :)
 
pishta said:
pans the key. 727 has a little "extra" on a corner, 904 doesnt. Now a 904/998/999 is another story. I know the lock up trans have a smooth "reservoir tip" on the input shaft :)
Click to expand...

Yep. That's a good mention too. Here's a picture comparing a lock up to a non-lock up. The lock up is the top picture
 

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Special thanks to everyone who helped. I actually feel alot better. We plan on only
About 450/460hp. I have read alot about the 904 in the last couple of days and am looking
Forward to the fun.
 
dartlove said:
Special thanks to everyone who helped. I actually feel alot better. We plan on only
About 450/460hp. I have read alot about the 904 in the last couple of days and am looking
Forward to the fun.
Click to expand...

Glad to help. At that power level you'll be fine with a 904 and the best part is it's more efficient, takes less hp to spin it's guts. That means more HP to the pavement :burnout:
 
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