The BPT can use the Probe GT (KLZE) transmission! You have to use the axles from...crap...I think it's like, a 1994 Protege or something like that....there's a write-up somewhere....
That's new to me...As for the transmissions, let me give you a little rundown. The transmissions, like the engines, come in both B and K series. The K series transmissions come on...well...the K engines, Kl03, KL08, KLZE, etc. The B-series comes on the B blocks; B6, BP, BPT. The KLZE transmission WILL BOLT UP to any B series engine, with the use of different halfshafts, and can withstand much more horsepower and torque; BP swappers also praise the K transmissions as having far better gearing.