This number covers the 727 based units. 46rh/re, 47rh/re, 48re. Can be used from 62 on. There is also one for the 904 based unit, think its 4295875ac, but you need to check. Covers 904, 998, 999, 42rh/re, 44re. One thing thought on these two gaskets and very important. Per the TSB that announced these new gaskets, came out in late 90's/early 2000, there is a corresponding pan bolt that needs to be used with them because the gasket is a little thicker and the new bolt is like two threads longer. If you use the standard bolt, you can strip out the bolt holes in the trans case since there may not be enough thread engagement. I don't remember the bolt number, you'll need to contact a dealer to get the number or bolts.
Cork gaskets are a well known leaker of fluids. The mothership used to use them then phased them out to the new unit to stop the incontinence issue. The newer RWD transmissions use a special RTV sealer on the pan instead of gaskets. Same goes on the FWD units but that started not long after they came out. The correct sealer is fluid specific for ATF usage. They used to have to use a small bottle of an additive that kept the ATF from foaming on the FWD cars because of the reaction between the sealer and the fluid but that stopped when the new sealer came out. So if you decide to use sealer only or a light smear of it on the gasket, make sure it's compatible with ATF.