Shortly after I got my SHO last year, I was acting like a kid with a new toy revving the engine, and when I shifted the transmission back into drive, it didn't shift right away, just acted like it was still in neutral except with no rev limiter. I didn't think much of it at the time because it shifted right into drive after that, but last week when I was trying to get out of a slippery situation on some ice in front of my house, during shifting between reverse and drive, it happened again. It just sat in drive and revved to 7k with no power transfer. About 2 seconds after RPMs returned to idle speed, it shifted into drive and I haven't had any other problems besides these. What could have caused this?