My technical knowledge is limited when it comes to gears but in general when engaged in 4L I assume the TOD is disengaged anyway and that there is a good chance that the Automatic is the same as many other isuzu's so I am not sure why one could not use the gears. Tera list the 3:07 as Isuzu Automatic nothing one way or the other about TOD or Model zu.

Anyway we will see it may just be a pipe dream.