I switched to Readline's Shockproof oil in my tranny ('06 FLHR) in the middle of last year, as many things I've read suggested it would quiet gear noise....which it seemed to. This year I've developed a VERY significant leak from the transmission output shaft seal, and the dealer suggested that this is not very common and PERHAPS the oil itself promoted the leak. Has anyone else had lead issues with Redline's Shockproof? More frequent leaks? I wanna know so that once the seal is replaced, I put in a lubricant which doesn't lead to another annoying and costly leak.