Never before I has been in none forum, I am starting to participate and thanks a lot for help me. I have a New Holland LS 180 year 2004 my first question is: The gear oil transmission 80W-90 applied is different to Hydraulic oil W 68 applied to the pipes and hoses and what difference has. The second question is if it is different where is the place for refill. And please excuse me for my English writing. Cordially Juan F