Coincinentally, I spoke with Bob Carpenter on Thursday about my transmission.
He said that the GENII Busas transmission is already back cut from the factory, so no need to send it out and cut it.
With that being said, it's "probably" not the transmission.
I was VERY suprised at how nice the clutch slips in my 09, as opposed to the first GEN Busas.
Let us know what ya find.