[Steeveedee]

True. 4 years ago we went to Randsburg, out in the Mohave desert. Driving the 14 HWY north, the engine and trans (I have an oil temp gauge for it) both were running about 260º, pulling those grades. I know that they both can handle that for short periods, but I'm also sure that they were both heat-damaged. Whatever I do for an engine, I'm going to have the trans gone through, as a matter of course. I have since cured the heating issue (I think- I will be verifying that in late October).