Are you sure it's chaincase fluid leaking, or could it be transmission fluid? I've spent more than a year in and out of the shop and over $1,000 on repairs. My symtoms on my '99 FXDX were transmission leak so bad, it got all over the drive sprocket, belt, rear wheel and even on the rear fender. Finally, we discovered the problem to be a 'hair-line' crack in the spline area of the main gear . If the threads on the gear hadn't broken off when the nut was removed (for the eighth time) we never would have really looked at it with a magnifying glass! I believe this was a material defect right from the factory, that took 10,000 miles to manifest itself. After replacing this main gear the problem has been solved. I guess it's true, given enough time and money, you can fix anything! Make sure of the type of fluid you are leaking. My local H-D shop failed twice to determine the problem, and I worked with a local independent shop until the problem was fixed.