Transmission Not Go Into Gear problems of the 2010 Buick Enclave

My 2010 Buick Enclave, with 60,000 miles lost power steering while I was travelling on the highway. The steering basically locked up, I had great difficulty getting the vehicle off on an exit, so that I could call for help. I had to be towed to a dealer. I was told that the there had been a leak in the rack and pinion assembly leading to pump failure and gear damage, their estimate to fix: $1800. I was also told by the service department at the dealer that the engine motor mounts are loose, the engine physically moves about 6 inches when the accelerator is pushed.