2015 4x4 actuator

Hi all can anyone please advise what to do when your 2015 5.7 tundra won’t go into 4x4. Light flashes on dash..but no 4x4. Then beeping when try to drive and have to turn off and on to get to 2wd with no flashing thanks

 

I replaced the actuator on my 2016 after it was being stubborn going into/out of 4WD. It was also making a hard shift/clunk when it would go into 4WD. After the actuator replacement, no issues.

 

Where can I get this part?

 

Dealer

 

Do you happen to have the full name of the part? Because the actuator comes as the front wheel actuator

 

Prevention - drive 10 miles in 4WD every month

 

Driving in a figure 8 or back and forth can help loosen the stuck actuator