I never lock out gears. I let the tranny figure out what gear is needed.
Towing my trailer up Parleys, I''ll see oil temps hit 240° So I see nothing to worry about with your temps. The 6.7 uses oil to help cool the pistons. It shoots a jet of oil on the bottom of each piston, each stroke. This helps to cool the piston and during heavy work, The combustion chamber temps can climb and the pistons need the extra cooling.
Hey quick question for you. Recent trip up Parleys canyon to I-40 this is what I saw in 5th gear (locked out 6th) 65mph the whole way in my truck empty. 213 oil temp 197 tranny temp and about 10psi on all inclines. Does that seem normal to you? I thought engine oil was a bit high for being empty. thanks in advance
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