Replaced PTU at 58,000 miles - total cost was $1,554.76. I have a 2007 Lincoln MKX. It all started with a smell like rotten eggs, sulfer smell, or propane smell. I guess this is from the synthetic (sulfur based) gear oil leaking from the PTU. Turns out it was a PTU leak which did not drip onto the ground so it went unnoticed.
I first started smelling the sulfur stink after driving hard (about 95 mph) for about 250 miles. I guess this was too fast because I can only guess the PTU got too hot and the seal started leaking.
I drove it for three more months and it started getting noisy. Had to replace the entire unit. $1500 bucks!
When is FORD going to recall this? What can we do to report it? Will they ever do anything about it?
