The T-case fluid will definitely cook at those speeds for long periods of time; if you must drive at those speeds, you will want to stop every few hours to let the truck cool off. An external cooler for the t-case could help that situation.
Slow and steady might be a better idea... 65 with fewer stops would be better for the truck and get you there in close to the same time - better fuel economy, too! (Yes, I said fuel economy while talking about a Hummer!)
I would be less concerned about the geared hubs, myself.
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Originally Posted by Winneconne
Guys, I am considering taking my 03 H1 to Colorado next year, and would like your input on long freeway use. Usually I run 80 MPH when I drive there and don't know if this would effect my truck. Any input would be appreciated. Thanks,  |