I just joined this forum today! I love my 2011 Ridgeline which I bought new and have had for nearly 4 years. It's pretty much been a city truck all this time. Last weekend I took it to the beach for the first time and whenever I got into deeper sand, I heard a grinding sound underneath the left side of the truck for 2-3 seconds, then it would go away. It happened probably 4-5 times. At first I thought maybe it was the VTM-4 kicking in but I can't believe the system would "grind" intermittently like this. It's got to be something wrong with the VTM-4, wheel bearing, or steering. On the road I have not had any problems whatsoever. Any ideas?