I went to look at a '99 LC today with 150k. Everything looked good except the owner isn't sure if the TB/WP was replaced and I also noticed some sludge/grease on the transmission. The owner said he threw away all the records when his father gave him the vehicle. The timing belt did not look like an 18 year old belt, but I would most likely replace it soon if I purchase the vehicle. I'm more concerned about the sludge on the transmission case. Everything else underneath looked clean. The sludge was black and did not look like tranny fluid. Could something else be leaking? Anyone seen this before?