Transmission temerature question?

[thomas_sorrentino]

I'm not sure if I'm making more of an issue of this or not. I have a
separate trans. temp. gauge. When I start out and everything is warmed
up it's at a steady 170. When I get off the highway and start sitting
at traffic lights it goes up to around 220-230. Once I get moving again
it will go down to 200, but not back to 170. I checked the trans. pan
with the infrared and the gauge seems to be accurate. I changed the
trans. fluid and filter. Trans. sample came back ok. Removed the grill
over radiator and cleaned the outside the best I could. All other temp.
are normal. This may have always been like this and I just noticed it,
I don't know. Does anybody else experience anything like this? Is it a
sign something is not right?

Tom Sorrentino
1987 PT38 8V92
Bedford Hills, NY