"Four-wheel-drive usage frequency"

Koddtin
if you reread my post i never indicated that i engage 4hi or or 4lo on the highway I indicated that I engage both every time it rains.
And yes I actually read the owners manual and this is not my first 4 wheel drive truck.
I followed this same process on my ford ranger it's still on the road with over 200,000
miles
TOMB

 

You are correct. My owners manual for my 2004 says to be at 5mph when shifting into 4LO. I won't even take that chance. I come to a complete stop. 4HI, however I can do as long as I am below 50mph and I do that at an even far lesser speed as well.