Trans Temp In Cold

[Stang07]

First off, I have an 08 F350 Job 1 4x4 auto with a DPF delete, egr delete, cold air, and a Mini Maxx running the Hot Damn tunes with the Schedule 1 Low trans tuning. I have owned this truck for the last 5 months without an issue except for just changing the batteries a few days ago when one headed south. The question I have is ever since I've had it tuned about 4 months, the trans temp has never gotten above 163 and is usually around 157, but today, on the coldest day of the year at 9*F, the trans was up around 168 cruising on the highway at 65mph. I know this isn't much of a change but is there anything that could cause this? Haven't seen it this high ever. No slipping or wierd shifting was happening either.

[jlint1988]

My truck will do the same thing from time to time I live in tx so its always kinda warm, but now my truck started slipping