6.0/3.73/6speed in mountains pulling 8000 lbs
I have 2013 suburban 2500 pulling my new Creekside 27 bh which is 8,000 loaded. First trip with this combo over Stevens pass hwy 2 in Washington state. Once the serious climbing started I was 2nd gea...
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The performance on your 3/4 Suburban is prefectly normal. I just pulled my 8000 lbs toy hauler through the CA Eastern Sierras 6% +grade @ 8000 ft (called Sherman Summit)at 80 degree outside temp. I pull with a 2007 3/4 ton Suburban (6.0/4:10 with the 6 speed). Up to 5000 ft, I can maintain ~ 50 mph at 4000 rpm. Once I hit 7000 to 8000 ft, speed drops and trans usally drop to 1st gear at the top of the mountain (Tom's Place). Trans Temp max was 225 F. Not much you can do unless you to with a Duramax or maybe install a turbo! I have to admit, the 3/4 Suburban is a beast!! Have had no issues with it. Have pulled thru the Mojave Desert at 110 deg...both the water and trans temp are solid (+210 water tempand and +200 deg on trans temp)
