Trans slipps when cold
Here is my issue and I need some direction on what to do next. I have an 01 F250 with an auto trans (not sure the model of the trans). If I let my truck sit for a couple of days without starting it, then start it up and put it in gear, it acts as if the trans is slipping, or that it doesn't fully engage in to the gear that I put it into. If I start it up and let it idle for 10 seconds, it engages into gear like normal, and has no slip. I have checked the trans fluid, and it is full and clean.
Thanks for your time