Yep, first thing I did was pull the hubs to check the splines. Feel good and tight. Used a straight edge to check for any signs of twisting on axle at the splines - nothing. Hubs look good as well. Both hubs came off with very light tap of a rubber mallet. No signs of metal shavings / residue.
FYI - the ride is an 09 700. Approx 1200 miles on it, 90% of time is dunes. All stock accept for the big 3 engine mods. Thinking about it last night, I remember the last ride I did hook a root. But it rode and felt ok rest of the day. Last night inspecting the left tire/wheel, noticed that the tire has spun on the wheel. Unsure how far, but the paddle no longer aligns with the valve stem by a couple inches.
Any ideas?