Quote:
Originally Posted by Cusser
Mrs. Cusser's 2005 Yukon Denali AWD lost its highest gear and died Friday while she was towing the horse and trailer about 80 miles from home. Not that unexpected, with 170K on it...goes to get transmission rebuilt tomorrow....
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I am not sure how heavy the horse and trailer are, but towing in O/D is usually not a good idea. It's extremely hard on O/D when hauling a load and it is shifting in and out of O/D. That's why the "tow/haul" mode doesn't shift into O/D.
If you are towing on a nice long stretch of flat going into O/D isn't bad, because it will stay there, but once any kind of hills, or curves are hit where you need to slow down its a good idea to kick it out of O/D.