none of what you describe is normal. not up on auto lock or ADD systems, and it *maybe* a simple fix. but it's causing serious problems. binding in the drive train. you can break locking hubs and axles.
take it in to a shop, using only 2WD high, or what ever selection doesn't cause your issues, and have the codes pulled. your tundra should be new enough to have diagnostics associated with the auto lock system.
if you want to do it yourself, here's a list of FREE toyota factory service manuals for dl or online review, as transmission, engine size, and year of vehicle is needed to help you further.
http://www.ncttora.com/fsm/
for example,
'00-'03 tundra transfer shifting issues and trouble shooting is on page 2394 (TR-2) of this manual,
http://www.ncttora.com/fsm/00-03-Tun...Tundra_FSM.pdf
when i put my toyota tundra in 4 wheel drive low it stalls whats wrong?
Linear Mode
