I'm a little puzzled on the liner that was put in and the transmission fluid pump. I had a Jamboree (89) and my biggest problem was water leaks from the roof and in the cabover section. Rotten wood was my biggest problem. I had a '96 Pace Arrow that had a soft floor in the bathroom & kitchen. I found the plywood floor was only 15/64" thick and no support for 22". I removed that and put in 3/8" marine plywood plus a couple of supports and there was no more sag. I hope you are this lucky.
Is the transmission pump a Remco? That would go in your car with an automatic that is not normally towable. I had one on my PT for 8 years. Thhey have different models for different cars.
