Thanks civdiv.
Here are the new values using the tranny cooler. The weather conditions were pretty much the same. 4C outside temperature.
The engine temperature shows 104C.
INPA engine temp 219F = 104C
INPA tranny temp: 203F = 95C
While cruising I got 189F = 87C
So the cooler works well but I still have a small harsh downshift 2-1.
Although I thought was related to the temp, most likely it's something else. It could be timing. It just happens at the same time the gearbox temperature reaches 200+F degrees.
I will keep an eye on it.
