identify this transaxle - 610RWB

ok, i already know which line means what (i.e. which line is transaxle, which is year model, which is model, etc... what i want to know is, what are the CODES? knowing which letter signifies which thing is great, but all i know is, my transmission is a "B" (i.e. 610RWB) - i know the 61 means it's a transaxle, the 0 means it's a 2000 model, the RW is the model number, & the B means it's a 4T65-E? i know W would be 4T60-E, but from the ident pictures i've seen, this trans is a 4T65-E.... i just wanted to verify with the id tag, but it seems as though it's some closely guarded secret or something....... anyone know?

I called GM parts and they have no way to id this trans from this id tag
they had to have the last eight numbers of the vin number to id it.
and yes it is a4t65-e just like yours.

Welcome to AF, you have replied to a 3 year old post, please check the dates this is way too old, thanks.