[GTP Dad]

Unfortunately, I believe the transmission is on its way out. Unlike the older transmissions there is no real way to tighten the bands in the newer model transmissions. Not only do you have slipping clutches but it sounds like the internal pumps are going bad too. You can try a bottle of Lucas Transmission Additive that may buy you some time but I believe that you will end up with a new or used transmission in the near future.