Tire Pressure Monitoring System problems of the 2005 Ford Freestar

I had taken my 2005 Ford Freestar van to be checked for a problem with the transmission because it wasn't shifting properly. Then later I had taken it to a Ford dealer for the check engine light to be diagnosed - they claimed that it couldn't be diagnosed because it didn't write the code properly. Transmission still not shifting properly. A month later the transaxle light came on, the engine wasn't running properly and in the rain the check engine light would blink on and off. I took it to a transmission specialist who actually took the time with the van to diagnose it. He had to let the engine warm up long enough for the lights to start coming on. Then he diagnosed the problem to be the 2nd gear in the transmission. Once the transmission was removed he said that it couldn't be fixed so I had to install a new transmission - $2700 later and had to borrow a vehicle from family to go on vacation. I also had to replace the air compressor for the air conditioner - $500 later but now it seems to be giving me problems again. I have had numerous issues with the tires - they don't hold air because of the rims that don't allow them to properly seal. I had the dealer put on the last set of tires and told them to fix the issue - so far I haven't had an issue. But for 60000 miles I have had issues.