Hey, how is everyone doing out there.  Good I hope.  Well I got a question about a John Deere LT155.  I walked into my barn the other to get it out and cut some grass and there was a large amount of fluid under the rear end.  I  have called around and everyone is telling me that it is a sealed unit.  That may be I am not judging these peoples answers.  So if it is leaking there has to be someway to either fill it back up or I have also read about repair kits.  I am not sure where the leak is coming from.  I got under there and wiped everything down.  It may be coming from the gasket.  I was just curious if anyone else has had this problem and if so what was the outcome.  Replace the rear end or if there is in fact a repair kit.  Also if there is a way to fluid back into it what type of fluid goes in there.  Thank you for any help that anyone may give.  Have a great day.