i have a 04 vw touareg....When i go over a speed bump my front differential locks and my front tires pull when a turn. I have to cycle through the selector on the differential then it goes away
If anything was wrong with the diff that would lock the wheels it would not be able to be fixed by cycling thru the hi/lo dial. If gears lock up that's it.If the front diff locks then something is up with the gears. There was never a locking front diff option on the Treg. Either your stepper motor is bad or needs software update or there truly is something wrong with you diff. You would have to have someone look at either for you. All anyone here is going to be doing is guessing as I have done.