Are you sure it has an internal filter that looks like a later model filter. IIRC all you would have is an internal screen. That external canister bolt to the 904 would contain the actual filter. If this is not correct, perhaps someone knowledgeable about pre-65 904’s will chime in - perhaps @Charrlie_S
Thank you for the reply! You were right. I did finally find in the manual where it says that the transmission has an external filter. Also, see the post from Charrlie_S that confirms.
