I know this is stange, but I have been trying to find the difference between automatic transmission fluid and hydraulic fluid. I am looking to find a fluid with the same properties as ATF but without the red color for a "home made" cleaning solvent. (My thinking was that ATF is dyed red so you could detect leaks, but perhaps I am wrong.) I figure some of the more vetern mechanics may be able to shine a little knowledge my way. Thanks.