2002 tacoma 3.4L not engaging in gears??

Hey, trying to get some help so heres my story i have a 2002 tacoma 4x4 3.4L 5speed..

Yesterday I was driving my truck and it was working perfectly fine..parked it overnight for about 8-10 hours and in the morning i went to take it for a spin...so i fired it up eveyrthing was fine let it warm up for a minute in nuetral pushed the clutch in and shifted into first and as i released and pressed on the gas the truck didnt seem to move anywhere just revd up as is it was in nuetral..so i put it in reverse and it didnt the same thing didnt move but gave a little whinding sound not very loud at all though....then i put the 4wd on and the truck moved as if nothing was wrong..but once i put it back in 2wd it does the same thing?
anybody got any ideas?really weird because my truck was working perfectly fine the day before

 

Are you positive and your t-case is in 2 hi and not neutral?

 

X2 on that. Make sure you are in H2, if you are in N nothing will move no matter what gear your in.