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opnspaces's avatar
opnspaces
Navigator II
Jan 07, 2020

UPDATED Coast on the uphills accelerate on the downhills

Link to the update Jan 17 2021 I learned something new after 14 years of towing the same trailer. I took my first trip in the new to me 2001 Suburban pulling my 5,600 lb trailer. My older Suburban...
drsteve's avatar
drsteve
Explorer
Jan 12, 2020
My 06 with 4L80E runs cooler when I leave it in D and tow haul. Selecting 3rd always makes it run a bit warmer, even on flat roads. Temp is usually around 185 or 190 towing, very seldom goes over 200. Unloaded it stays around 160-170 ish.

I have never noticed the TC locking in 3rd.

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