Cold weather or worse?

[wmj]

Last couple days it's been cold here in Ohio.yesterday and going into today when I be at a stop light and turns green i start accelerating my car it shoot up to 5000 rpm then finally shifts usually its shifts 2500 rpm. Its not happen every time. I have a 2003 automatic MP5 with 80K miles. I don't know if it's just because of the cold or something worse(tranny). If anyone can help it be great thank you.

 

[kms1990]

does it do it more when the engine has not warmed up fully? if so i would say maybe the cold. if not start with a simple fluid level/condition check. if its low add some import multi vehicle or mercon V (5) i would use mercon V as thats what the manual states, import multi vehicle will cover mercon v requirements but better safe then sorry and i think the mercon v is cheaper. if its brown or dark in color you need a new filter and fluid, do not flush it if its brown, shops will try to get you to do that, its a bad idea! just a new filter pan gasket and fluid. if its low and dark adding is ok, but just know it needs service. if none of the above it may have more than a fluid issue, and maybe failing mechanically somewhere in the transmission