Vehicle started losing power while towing camper trailer 11k from Moura Qld. RACQ drove vehicle to garage then tested automatic transmission and said it is stuffed. They had a 2nd hand transmission delivered and took 4 days to instal it. Tubes were different sizes because it was a later model??? The test drive reveled a retarding when accelerating from slow speeds and an error message saying a coil pack was faulty. The next day there were no error messages but now the retarding occurs when going over a bump. The mechanic has checked all wiring connections. He now wants me to drive it to a transmission specialist at Rockhampton to have him check it. We have been stuck in the Moura caravan park for 17 days. The cost of the transmission was to be about $5000 with a 1 year warranty. This extra work is frightening. The vehicle is only worth about $9000.