I have an 06 F150 4x4 with 3.73 LS in it right now.....going with 37's..do you have to regear both front and rear? I'll be honest I don't use 4x4 that often and if I do it would be to get through some thick snow and thats about it. I was looking at these let me know if they are good

http://www.americantrucks.com/gears-489-975-rear.html

http://www.americantrucks.com/motive...n-kit-99-.html


oh and I mean "gearing" not "dearing" D'OH!

 

Yes you have to regear both front and rear. Or never use 4wd again.

 

If you don't regear both pumpkins, and attempt to use 4WD, you will destroy the transfer case.