Thai-
Correct me if I'm wrong, but Active TRAC (A-TRAC) can be disabled. The ONLY way, that I'm aware of anyway, that the A-TRAC system can be disabled is when the T-case is put in 4Lo (VSC off) AND the transmission is ALSO in Lo (1st gear.) Anything other than 4Lo/Lo (4Lo/2nd or 3rd, 4Hi/Lo)...