Dodge has replaced my transmission three times under warranty. Today I went to pick up my truck. I asked the dealer to take a test drive. We parked on a steep hill. I asked him to back up my truck. It Still jumped and slipped In reverse. I pull a fifth wheel. No problems in any of the six gears just reverse. What is going on? I three year warranty runs out next month. This problem has persisted since they replaced the transmission. Any ideas? Any suggestions?

 

Has this been a problem with previous transmissions? Was that why they were replaced? Or is this something new with the latest trans?