A999 tranny same as 904?

you're not going to find any info about OD benefits for a 999 because they are not an OD transmission.

though some 999's came with a lock up converter, it's hardly another gear.

Thanks. Did more digging. Looks like a beefy 904 so no gain for me over my current 904. I guess I am back to the A518/46RH .......
unless I can find a A500/42RH.

Sorry for the hijack.