Hello Everyone. Lets get this out of the way first....2007 Expedition EL 5.4 6sp 4x4 Limited. 190600 miles. When I accelerate from a stop something shudders. I'm not certain what it is, but I think its the tranny. It will shudder for a second or two and then quits. Biggest problem is that it is not consistent, it only happens once in a while and I cant duplicate the problem. It has not happened in weeks, but we are planning on towing our 5500 lb TT to the Grand Canyon this summer and don't want to be stranded. No, I haven't checked the fluid and that looks like a ton of fun to do...why cant it have a dipstick. So it could be low. I also don't think it has been changed in a long time, I bought it with 119000 on it and I don't know if it has been changed. Anyone had a shutter like this? It almost feels like it is shifting down to first and then it will shift through 6th without issues...next stop light or sign it will be fine. Thanks in advance.