99 3.8s/c had a real bad leak about 1/2 cup in 10 minutes Pulled the motor and changed the front seal. Put it back together and still have a leak but not as bad as before only about teaspoon in 10 minutes. I tried Lucas to swell the front seal some and had no luck stopping the leak. Where could the leak be coming from the tranny has 165,000 miles on it. Thinking about getting a junkyard replacement getting tired of pulling this motor out. If I had this one rebuilt what is the average cost.