My car is leaking oil. Bad. This is the most it has ever leaked. I parked my car while it was running and there was a puddle in about 5 minutes about 4-6 inches in diameter. It appeared to be leaking where the transmission and engine meet. When I was driving, I noticed smoke when I was in rush hour. I thought it may be coming out of my pipes, but when I was standing still I noticed it was coming out of the sides of the car, and I have tail pipes like a 87-93 LX so the go straight out of the back. Would a leak by the tranny and motor be enough to get onto the exhaust pipes and burn off? When I was parked, I did not notice and smoke out of the tails. I have a feeling it’s the rear main seal. If it is how much of a pain in the ass is this to do? I have access to a lift and tool. What does the mail seal do exactly?