[B]I purchased a Nuvi 58LMT unit last year. I have been trying to resolve an issue with the ETA on the unit however I have not figured out a solution as of yet. When I use my Nuvi 58LMT and travel distances of 30 minutes or longer, the ETA does not make any sense. On a 30 minute drive it could be off by as much as 10 - 11 minutes and on an 8 hours drive it could be off by as much as 75 minutes. The ETA times on my 58LMT is being compared to the following Garmin units I still own: GARMIN 360 AND GARMIN 755. The 755 has a traffic receiver as does that 58LMT. I did email Garmin and they took some time to look at the issue and the basic answer I got was that different units function differently (possibly mapping issue). On all three units I have the latest software possible. The older 360 and 755 match up to Google maps and since I drive some of these routes periodically, match up to real world conditions. With Garmin we have checked settings and all the settings match perfectly on all three units however I would love to determine why such a time difference on a newer unit. The Garmin 58LMT will adjust the ETA as I drive sometimes shedding as much as five or ten minutes at a time on a longer trip. Garmin did do tests on units similar to mine, got the same results however could not provide a concrete answer other than maybe a mapping issue. Does anyone have any suggestions and would I just be better off trying another model? Thank-you [/B]
