You have to have a pretty good idea where you're going before turning on any GPS. I have the 770 and it works flawlessly. It's routed me around a steep RR Crossing (bottom out) and several low bridges. As indicated in Post# 3, make sure you scroll through all the menus and select the correct profile for your RV and your driving preferences. Not much difference in the tow models but did you get the RV model or the LMS (trucker) model? Preference options are very similar but the RV model has a lot more RV specific data, like campgrounds, etc.
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Now an SOB
Traded Thor for Melbourne Prestige 24NP
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
Blondie passed in 2020 at 5 to Leukemia
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