F150 Trans Issues?

[82hatch]

Have a 2007 F150 4x4 and the trans seems to slip at 50 mph and when the trans downshifts when going up hills. Need someone to look/scan it. Check engine light is not on. Anyone have any ideas?

 

[mustangmike6996]

what year? is it consistent (on every hill)?

how is the fluid level and condition?

 

[82hatch]

what year? is it consistent (on every hill)?

how is the fluid level and condition?

sorry it's 2007. Fluid looks good. I'm going to add a 1.2 quart(looks a little low) and ss what happens. Does it at 50 no matter if its going up a hill or not.