Well, I hate to say it but is sounds like it's going out. I'm sure you checked the level already. I am currently rebuilding mine. It came out quite easily, with the exception of a few choice words about the two top tranny bolts. The dissassembly is quite easy. The transmissions is held together with snap rings. I bought my tranny kit from Checker auto parts for 279.00 yesterday. I had to order it. I plan to install a shift kit after I assemble the tranny since my pay day will be next week. I'm in no real hurry to put it back together. Don't let the tranny people scare you these are very easy to work on with out any special tool. If you do decide to do it your self there is a couple of tricks I learned along the way, like taking out the starter for one can be a huge pain. But I found a way around it.