I am fortunate in the extreme to have access to/ use of a Kubota RTV 900 for purposes of getting my firewood from the woods to my stacking location (a modest distance mostly through local woods and short backroad); I don't own it but am allowed to use it and in return do everything I can to actively maintain it/ use it with reasonable care. It's probably 3-4 years old with about 350 hours on it Today, for the first time ever, I am noticing that when I step on the throttle (which I always try to do gradually) there is a lag time or "wind up" that seems to need to take place before it moves forward with full "gusto." The diesel engine revs up with full promptness, it's as if there is something else that has to catch up... if it had a torque converter, I would be concerned about that, but to my knowledge,although it is hydrostatic, it does not have a torque converter. I first noticed it with a load in/ on it, but am also detecting this unloaded. Never detected this before. Off to go read the manual and check all fluid levels- but wanted to ask for any experience/ suggestions/ wisdom/ insight here. I really need to keep getting my wood out of the woods, so down time is a worry, but I also don't want to do anything adverse to the machine. thanks!