2000 Camry

Having issues with the transmission. The Trans is slipping only in reverse. I have had the trans inspected and cant get anything pinpointed. I was needing to know if there is a fix to the problem without a rebuild. It does not slip at all in the forward gears?:banghead:

No matter what to this the unit must come out, it may not need a complete o/h but it will have to come apart.