Just wanted to post a positive message! I've been driving with this horrible drivetrain tick for about 30k now. Well I put some engine cleaner through it the other day and changed the oil and filter (2 days in a row) and the tick went away!!!! woo hoo!! This thing has 200k on it and it runs like a top. I love my trooper. btw, I had tried this before with seafoam, mmo, chemtool,.... just to name a few but to no avail. this time it worked. I'm running 10w30 dino oil and a wix filter. Anyway I just can't believe it. If this has happened to anyone else I would love to hear about it.