The coquihalla is a extreme grade, 90 km /hr with out a trailer would be hard on a vehicle. I guess the point i was trying to make was that using a sensible speed with a lower gear ratio should be easier on things, I will give a example. I had a trans temp guage in both previous trucks, I found on a hill like the coquihalla that in second gear around 50-60 km/hr the engine would spin around 4000 rpm, making nice power and the trans temp would stay well within reason. I would rather take my time a bit on these big hills and keep everything happy
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MacRae, 21ft
2016 GMC Yukon SLT
St.Albert Alberta
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