I expected to see something telling me not to use 4wd on dry pavement, but I didn't see it for just switching to H4.
So I went to toyota.com and clicked on Email Toyota and asked about it.
This is the response I got:
The main distinction is the use of L4 versus H4.
With H4, there is no concern with driving (or shifting) on dry pavement. Though the vehicle should be below 62 MPH prior to shifting to H4.
With L4 however, the vehicle must be stopped with no wheel slippage prior to shifting into L4, and L4 is not designed nor intended for use on dry pavement.
Not that I have any reason to do it, and I don't plan to try it out to see if they're right.
Did I get bad information, or has something changed for the newer Tacoma's (mine's a 2011)?