A904 Transmisson deeper oil pan questions

Slantsix64 said

So my pan is all rusty and wanted to upgrade to a deeper pan with a drain plug. I already have a nice transmission cooler in front of the radiator.

Any real benefits beside a drain plug?

Also I found a extension adapter but it’s says it works for the 727 a518 transmisson, will it work on my a904. Thanks in advance.

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If your 904 is 1965 or older (cable shifted) the filter extension might not work. Those transmission had a rear pump, with two holes in the filter. Most of the filter extension only have one hole (no rear pump). You could modify the extension by adding the other hole, if it is a billet extension.
PS: the filter for the early trans is different, also. Just a FYI.