I did some searching and while I know I've seen something about it here, I couldn't find anything. I'm putting the topic here hoping it'll get more views than the 94-98 board, and since I think this trans is generally multi-platform. Anyway:

Just wondering what you guys who plow with a stock auto are seeing for normal temperatures, and if I should worry. Even in the summer, I seldom see over 140° on my ISSPRO running to the rear/passenger test port, unless I'm pulling a trailer in traffic or uphill before the TC locks. Even then, it only ever gets to 190° or so before I'm coasting down the backside and it cools down pretty quick. Sitting idling in the heat it'll creep up there too, but again, cools down quick once I'm rolling in lockup.

I have an old (well, old as the truck) 8' Fisher Minute Mount, and while it does run a little warmer down the highway with the plow on- which is to be expected I think, even with the blade square and close to the road- it's still pretty cool. Even plowing it doesn't get up higher than say, 190° for the most part. Unless I'm doing lots of back and forth, mainly backing up fast, then it gets up in the 215-220° range. It hasn't gone higher- yet- but isn't that really cooking? It isn't so hot that it effects the engine temp, so I'm not freaking out yet, but I do wonder just when the running temp becomes dangerous. Unlike say, towing uphill for a few miles then letting it cool down, plowing snow can mean hours at a time at these temps. It isn't unusual for me to find myself alone in a big lot running the trans 215° for several hours at a time, only letting it cool down below 200 a handful of times while going from account to account in a twenty or thirty hour storm. Is this normal, or am I baking the hell out of it?

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Hm. Apparently, about 40 people so far are as curious about this as I am.

 

I would say the temps are ok for what your doing in the snow because the blade is blocking some of the air flow into your tranny cooler. I would keep an eye on the temp
and if it gets to high,you'll have to stop and let it cool down before the fluid starts boiling.

 

That's just it: I don't know what that temp is when I need to start worrying .
Should I assume it's ok until the engine temp starts climbing?

 

190 is fine you should be anywhere from 170-190 normal driving-towing, might get a little closer to 200 in traffic but i have always been told that anything above 225 you should start worrying.

 

Yeah, it hasn't really gone above 220 yet, but. You know.