Installed new 5.29's in my buddy's 2002 4runner. It has the push button on the tcase shifter and the center diff lock. Now when you push the 4wd button the whole truck goes into neutral. When you push the 4wd button and the center diff lock everything works again, but not sure if front diff is engaged because you don't get the binding feel in the front end like you should. Any help? I am stumped.