Ben Im not sure if its locking or not . I did run in t/h mode . I will probably try your DIY trick with the lock up led light thing to see if its locking down low .If I knew how to log I would try :rofl: funny part is it feels faster from 60 - 120 mph than it does from 0 - 60
Yeah sounds like you have one of those dumb allisons.
What converter is it? Wire up the lockup LED and see what happens when you do a boosted 4wd WOT launch.