904 Transmission - No Numbers??

[RichardR]

Hi all,
I bought a 904 lock up transmission a few years ago and I can't seem to identify it or how to effectively identify it (i.e. what car it's from / year made etc.) . I looked in the typical spot on the driver side above the pan and the location where it should be is obvious but no numbers. The picture attached is of another tranny I just got with an engine and this other one looks the exact same, just no numbers.... Any ideas why? Or any other locations that was an alternative marking location?

All I know is:
Small block 904
Lock up (torque converter and machined shaft end)
"Apparently" from an 1985 Diplomat.

Thanks

 

[RustyRatRod]

Sounds like you know more than we ever would especially since you have the transmission. Just tear id down, you'll know what you have then.

 

[RichardR]

Anyone else get one with no numbers at all?

I figured I'd have to tear it down. More curious why there's no numbers

 

[Demonracer]

Probably a warranty transmission.

 

[RichardR]

Probably a warranty transmission.

Oh never thought of that. That's plausible

 

[70aarcuda]

You have numbers on pan rail.

The 413xxxx number will id the tran

 

[RichardR]

You have numbers on pan rail.

The 413xxxx number will id the tran

The picture is of one I just got. Just trying to illustrate I know the basic area to look at. On the other trans there's nothing stamped on that spot