Can cold weather screw up transmission settings?

[seltaeb]

On one of my previous threads someone chimned in about what the changes actually were. If you lower the shift pressures all the way to -25% it will help but still shift a little hard. The best way is to have mikel get you a custom tune so you can then set the shift the way that you want it.

[jcbst12]

Thats what I did, but only by -2%. It works until you jump on it and then (only occasionally) it will keep shifting hard after that.