Looked at a '99 Cadillac DeVille Concours the other day, low miles for the year. Drove/shifted fine, but I did see (it was dark) the bottom of the engine bay had a light coating of oil. If it weren't for this, I might have bought the car on the spot. This car was other wise in nice shape, surely elderly driven, and looked to have been parked inside all winter or driven to FL or AZ for winters. I hear horror stories about these engines, not so much the trans. What do you guys know about this car, specifically the L37 Northstar and 4T80 trans?