School me on a transmission

Looking for some help,

I've got a cop 904 variant, which to the best of my knowledge is an A999. How do I differentiate that for sure without busting it open and counting clutches.

Second, I'll be pulling said transmission soon..is it really as simple as everyone says (remove linkage/lines, support engine, remove crossmember, driveshaft, bellhousing bolts and flywheel bolts)

Lastly, while it's only coming out to address a leak at the back of the engine, would it be better if I just went...

School me on a transmission
Author: brotherGood