My 2001 Dakota 4.7L 4x4 seems to 'want' to downshift at odd times. It's an automatic transmission. It almost feels like the brakes are being applied. The 'braking' lasts less than a second. Seems to occur when I am coasting downhill and I'm moving around 40-45 mph. But there's no full downshift. The rpm's sometimes jump up a little, as would happen with an automatic downshift at low speeds. There's enough fluid in the tranny and it looks clean. I had a full service on the truck about 15k miles ago. I've got about
105K on it. Any ideas before I take it in to the shop?