a problem has developed where when the transmission is cold - it will be difficult to get into the next gear. Not sure if I would really call it slipping, because when I check the fluid level - it's good. I have to get the RPM's up to 3000 or so until it will go into the next gear, and if the RPM's drop under 2000 it will downshift to the previous gear. And it never did this before up until recently. Once the transmission is up to temp, it shifts just fine and run greats.