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Two questions?

1. What is the best RPM range for driving in the mountains with an 8 speed tranny with 5.7 Hemi? I'm going to Mt Rainier Paradise around noon today and it's fairly steep and I've read where a 8 speed tranny can overheat going back n forth too much, so I think manually shifting would be best, so what is a good RPM range for that, like what is too low/lugging and what is too high/rpms? I want to get use to driving this before towing my 6,000 lb trailer this summer. Or is it OK to just let the auto shift itself?

2. Are these temps normal? When I drove on the flat stretch I-5 to Salem two weeks ago in 62 degrees rainy weather, I got these readings? Is that normal for a 2014 Ram with 8 speed tranny with a 395 hp / 410 torque 5.7 Hemi?
 

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trans temp is ok on your photo. it shouldn't exceed 220 F

engine and oil are a bit high, but it was not just walk around. it was towing.
 
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