I have a JD450C that is leaking hydraulic oil out of the transmission. Looking under the back of the machine it drips off of the right final housing. I assume the dozer is cracked because this one hasn't been all welded up like some I had looked at. It's always leaked since I bought it. I've put about 400 hrs on it and it loses about 2 gallons of oil a day when used. It also drips when not used but not near as much ( I assume because the oil is not as hot). Anyone had experience with this? How hard is it to repair or any idea on how much it will cost to have it repaired? I would like to fix it because I figure it will only get worse.