problem topping up low auto transmission level
I have a 2011 FX4 Ranger and I noticed after driving my vehicle for slightly over 40 KM that my auto transmission fluid level was just slightly under the lower hatch mark when checked. With the vehicle in Park and engine running I added about 100 ml of tranny fluid. I moved the gear shift through all the positions and then rechecked my level. To my surprize it had not changed and there was no indication of fluid leakage anywhere. I repeated this process 3 more times adding a total of about 400 ml and still the level remained the same. Frustrated, I phoned the dealership to ask him what the heck was happening here. He told me to bring it in and he would check it. After driving it to the dealership, he checked the level and behold it was now significantly higher at the very top of the hatched section. I was scratching my head now? I had put more fluid in than I intended but he felt it was still in an OK range even though it was right at the top mark now. The only thing I can figure is that the truck needs to be driven after adding tranny fluid in order to get a correct level reading. I'm very baffled by this as the manual makes no referance to this requirement. Maybe one of you guys might have some insight as to what is going on here. I'm beginning to feel like I'm in the twilight zone!