1st Gen Engine Talk - I4, I5, and V8
My old 99 TRD Tacoma and my friends 08 TRD Tacoma both have to be in 4 low.
I dont have any experience w/ the newer Tundra.
So I dont know which model you are talking about.
Also the e locker is crap, mine failed w/ 33s. my buddy who is a toyota tech says they are fairly prone to failure.