Scotty,

2014 Chrysler 300c, hemi, 5speed NAG, RWD, 42000 miles.

During cooler weather, I can go through the gears fine on the initial drive from startup.  But if the transmission is still cold and I have a stoplight to wait through, on acceleration, the transmission doesn't feel totally engaged and will be very slow to shift.  But then if I hit another stop light and then accelerate, the shifting will be back to normal.

Also on that first stop at the light, if I shift the transmission into neutral, I can avoid the slow shift problem.  

I haven't noticed this problem in hot weather since I bought the car in 2018.  The owners before me only put on 9700 miles in 4 years, likely in town driving.

Is there a thermostat problem or a pump problem or need a fluid filter change or a stick of dynamite?  Old fashioned Mercedes 5 speed NAG.

Thanks!