904 Identification Help - 1967?

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JakenBake805

JakenBake805

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I need some help identifying the transmission I picked up on craigslist.

I was told it was a A904 for a small block Mopar, which checks out from the research I've done. I cleaned up the numbers on the side and they read "2801534" (see attached pic).

According to this link :http://mymopar.com/downloads/transguide.pdf I have a '67 out of a 273 baracuda, dart, valiant, etc. (Bottom right of pg. #1)

Everything I've read says the 904 switched from 18 to 27 splines on the input shaft in '68 but my (apparently) '67 trans has 27 splines on it (see attached pic)...

I am looking to buy an aftermarket torque converter and want to make sure I get the right thing. I know in general a '68+ converter will not work with older transmissions and most of the aftermarket converters I am looking at are for "1968+" A904s. Does 1968+ just mean 27 spline or is there more to it than just spline count?


By the way: First ever post here! Been lurking the site for a while absorbing information for my first ever Mopar build. Its a 1969 Dart that I am looking to get running cheap (LA360,904).

Thanks!

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The hub on the front of the converter is smaller. That changed in 68. I think the spline count also changed at the same time. You may have a hard time finding a performance converter for it. But they make a converter spacer for it. Also there is an issue with a 360 not being neutral balanced.
 
Last edited:
bcschief said:
The hub on the front of the converter is smaller. That changed in 68. I think the spline count also changed at the same time. You may have a hard time finding a performance converter for it. But they make a converter spacer for it. Also there is an issue with a 360 not being neutral balanced.
Click to expand...

Ok, so is it weird my '67 has 27 splines on the input shaft?
I thought the '67s were supposed to have 18 splines from what I have read on here...

I have a B&M flex plate so I can run a normal converter. At least that was the plan...
 
67 was the change year, 1967 904 will have the larger crank pilot and will be a 27 spline input shaft behind the 273 engines.
Lon
 
That will work for all 67 up 904 transmissions with 27 spline input, just verifying that your crank is a 67 up 1.810 pilot .and use the correct flex plate weights for your motor.
Lon
 
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