why is my 4-whhel drive not working correctly? on 2005 Ford F-150

2-wheel works fine but when i put it in 4-high or 4-low its like the truck is in neutral. At first i thought my trani went but it shifts fine when in 2-wheel drive. This only happens sometimes and i have no clue what the problem is

by in Waterloo, NY on March 03, 2013
2 answers
ANSWER by on March 04, 2013
you could have a bad solenoid or something wrong with the the tranfer case,scan test it for codes
ANSWER by on March 04, 2013
scan codes and post so we can adv. poss shift solenoid