Join Date: May 2009
Location: Fort Collins, CO
I typically don't go much over 50 in 4hi, maybe up to 60. Not because of mechanical concern (as others said, read the manual - mine says you just have to drop below 62mph to shift into 4wd, and in 4th 4hi not to exceed 118 mph), but because if road conditions are bad enough you need 4wd active in the first place, you really shouldn't be going that fast anyway. It mostly depends on what the road conditions are and why I have it on. Snowpack and ice is going to be slower than just fresh/deep snow, spotty vs solid, heavy wet vs light slush, etc. Practice, experience, and not getting over-confident - or trying not to anyway.
'07 Tacoma Sport AC V6 Auto 4x4, Black
Still pretty much stock.