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Old 07-20-2011, 09:35 AM   #15
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If your Suburban has a tow package, it has a transmission cooler. It is hard to spot as it is inside the radiator. Your vehicle should do fine as long as it is in good mechanical shape.
Lots of good camping in Estes Park. Don't leave your rig in Boulder.
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Old 07-20-2011, 10:26 AM   #16
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Don't stress you'll be fine, as stated your Burb has a tranny cooler, and if it stresses at all you will get a message on the driver info center to slow and let it cool down. (I have never known of anyone getting that message.)

If you have the tow haul use it. Your 3.73 AWD would be expensive to change out, both diff gear sets would need to be replaced. IMO, not worth the expense.

We made the same trip years ago with a much less capable TV than your Burb, and survived with NO ill effects.



Enjoy the trip!!!
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Old 07-20-2011, 10:46 AM   #17
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Again, if a half ton and a 3 quarter ton have the same drivetrain there is no dif in power. More power comes from a bigger engine or gearing change. jim
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Old 07-20-2011, 11:00 AM   #18
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Yep there is a big difference. My friend has a 2005 with the 3.37 it has the 8.1 litter. My Sequoia with the 4.10 rear Will tow up the same grade at a lower rpm at the same speed. Now if we raced he would win because he has more power but 3/4 ton isn't always better.
We also live in colorado on the western slope at 7000 feet I tow 12 miles up the Grand mesa to 10000 ft to camp a lot, with no problems at 55mph
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Old 07-20-2011, 11:09 AM   #19
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I did much worse climbs with my '07 1/2 ton GMC with the same drive train as you, pulling an '01 25' Excella with no issues other than going slow up the long grades. Did one 10% in Utah up to 10,000 ft, and it was tuff, but made it fine. I was in low gear at 30 MPH at 4K RPM, but that's what the little GM engines thrive on.

I think my trailer was heavier than yours.
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Old 07-20-2011, 12:43 PM   #20
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Jason,

I believe 3.73 was the std ratio for the 8.1, 4.10 the option.

Wouldn't you also be at a slightly higher rpm at the same speed with the 4.10?

I know I lost about 300rpm when I re-programed the PCM for the slightly taller tires the PO had installed. (correct speedo now)

Bob
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Old 07-20-2011, 12:49 PM   #21
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Robert, I may have been,but thought it was a hair lower. The sequoia has the 6 speed transmission I believe the suburban is 4 or 5 speed.
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Old 07-20-2011, 01:04 PM   #22
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Quote:
Originally Posted by purman View Post
Robert, I may have been,but thought it was a hair lower. The sequoia has the 6 speed transmission I believe the suburban is 4 or 5 speed.
Jason,
Knew there had to be another reason, ours is a 5speed.
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