Trans gets hotter as air gets cooler?
Huh, lately my trans. has been getting up to around 160* during the late evening and at night. In the daytime (same type of driving) it nudges 100*- 110*. I realize my temp sender is not directly in the flow of the trans fluid, it is off to the side in a tee, so maybe there is an air pocket there...but as soon as my gauge starts climbing, I get out and check the temp of the inlet side of the trans cooler with my hand and it feels like about what the gauge is showing so I'm not sure how accurate it is. I will later move the sender either into the pan, or more preferably directly in line with the inlet to the cooler. But, my question is why does my trans get hotter as the air gets cooler? It only does this at night (so far!) so what gives?! BTW, it a mechanical gauge, and the tubing runs alongside the stock cooler lines across the k-member, and then into the side of my tee-assembly. As tired as I am right now, I'm going to go check for good oil flow thru the lines, and any suggestions you guys have will be much appreciated as always. Oh yeah, I'm almost due for a trans oil/filter change, so when I'm in there I will retorque the valve body bolts also, that will be the second time since the trans was installed.