Will the doors open from the outside if you jerk the handle real hard? Also, does the handles feel like they are connected, or are they real loose? My 89TC does the exact same thing, but I haven't gotten to fixing it yet. I have fixed alot of Freightliners with similar problems and the usual fix is making the connecting rod between the handle and latch shorter or longer. On the TC's I think the case is that the rod is bending over time, reducing the length of travel, so, I figured that taking the panel off and straightning the rod would fix the problem. Like I said, I haven't tested this theory yet, but it may be something you would want to try.