I doubt a fluid change will help, but if you are LOW on fluid, you might be able to help it. You need to have it running at operating temp. Pull the plug on the passenger side of the trans pan. There are 2 plugs; the one you want to pull is recessed in the corner of the pan, up near the trans body. Now the fun part: If you don't get a drip of fluid, you need to add until it's a slow drip out of the hole. The best thing to use is a garden sprayer. I bought one at Home Depot for $6.99. It's a small hand-held sprayer. Get some clear tubing that will fit over the nozzle end, and spray the fluid up into the trans. It's a messy job! They should have put a dipstick on it like every other auto trans on the planet. I just had the pleasure of doing it this weekend.