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when to consider more cooling?

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Old Jun 21, 2016 | 12:30 PM
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when to consider more cooling?

When pulling my travel trailer locally, I'm seeing temps of 190-210f at the pressure port. So for these short (~30 mile) trips I know I'm OK.

My concern is that the terrain here is far from extreme with relatively short rolling hills that dont generally exceed 5% so I'm not sure what one would expect once I hit some real hills.

Not looking to spend money unless really necessary, but not looking to get surprised on a real hill either.

This is on my expedition with the 4r75e and standard towing package (7 row aux cooler). I could upgrade to the cooler to the max tow cooler (14 row) for about $200.

From those who have more experience than I, what do you think? Am I on the edge? I'm a little beyond the 6,000lbs recommended limit for a truck without the larger cooler. The gvwr of the camper is 6900.
 
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Old Jun 23, 2016 | 11:25 PM
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From: Mi'kma'ki
ideal trans temp is around 175F @ the test port.your running good.with t-stats in front of my coolers,once up to temp im always running 180F.
if your somewhere between 175-225F @ the test port........run 'er.
 
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Old Jun 24, 2016 | 08:33 AM
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no argument with any of that.


but the basis of the question is:
from those with more experience pulling hills than myself, how much hotter should I expect to see when climbing long steep hills?


if it's 50°F, then I'm screwed and I need more cooling.
if it's 30°F, then I'm probably right on the edge.


unloaded to loaded is about 40-50°F depending on outside temps. normal driving is about 150°F
 
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