Thanks for all input. I like to get all opinions. I have tried all the published tricks, but the only sure bet is that it will not shift. The serial number is 22892 or thereabouts, and I suspect it probably has the new speed deal because the pedal cushions back out, and there is some glide in the higher gears. My terrain is extremely hilly. I was not joking when I mentioned 40 degrees. I pretty much leave the machine in 4wd low range all the time. Even on my driveway. Additionally, I notice that I spend an awful amount of time on two and three wheels. The shifting is best on the flats with no load. Worse with load, and nearly impossible on the hills. Yesterday, I brought loads of gravel up my trail to fill a mud hole and I had to turn around each time to dump. I would estimate it took about 3-5 minutes to make a three point turn. It also seems like a little extra force helps to shift, but I am loath to do so because of the linkage. I have the fluid and filters on hand, and I was planniing to romp in the frozen morning and then do the deed. Perhaps I should just try the filters. What do you folks think?