I bought my Kubota B2150HST new in 1996. I have used my kub for everything. It has 1,114 hours on it now and I am having my first problem. I got on it and hit the reverse pedal and it started shuddering like a gear was slipping. I pulled it back into the shop and it did it in forward too. All the attachment's (bucket and PTO) work fine. I checked the hyd fluid level and it was just touching the stick. Added 2 1/2 qts. to bring it up to full mark. Still has the same symtoms. It is over due for the screen cleaning and filter. Would this be the problem or have I fried my trans. Can someone point me in the right direction.