My has a 465T and has been having trouble with it routing him off of the main highways onto secondary roads ,it will do this if he has it on car or truck profile and tries to send him way off route, I have a c360 and mine keeps me on the main highways for the entire route, we tried removing all avoidances and still get the same results.
An example....From Neenah wi to Northbrook IL it wants him to run HWY 41 to Hwy 26 south of Oshkosh and 26 south to a county road then routes him back to hwy 41. and when in IL routes him off the interstate and runs him east almost to Lake michigan ,go south and the come bakck west to Northbrook.
