when I got my jato,it was used. the rear diff was out of it. The thing was a dirty mess.So I scrubbed it up greased it up and put it back together.....I used a minimal amount of high speed grease.Then it crossed my mind! Maybe its supposed to be dry?????....did I blow it??.....ya know it was greasy !so if its not supposed to use grease do you think maybe th diff is leaking???...and should I pull it apart and clean it all out and check the diff?????