2014 trd off road 4x4 issues

I'm new so i do not exactly what thread to post this in..

Today i was taking an offroad trail and i engage my 4HI and everything was fine. Im going up a small hill and for some reason i couldn't get up the hill i was just digging a hole. I went back to 2wheel and reengaged 4hi again and it didnt work, then i did 4LO and engaged my rear locker and it still failed. Keep in my mind this was a small hill, the tacoma is way more than capable. Makes no sense at all especially if it was lit up on the dash. So i go around and i go up another hill and my truck wont let me accelerate in 4 wheel, i had my pedal to the floor.

Has anybody had this issue or know what it might be?

 

Are you sure the 4WD was engaged, solid light not flashing?