It happens between 50-55mph. And it can be a slight jerk or sometimes hard. Also at first the tranny had a trans fluid pressure switch code where it would tell the pcm that its in D4 rather than park and sometimes say invalid. So I replaced the switch from the old one to the new one and also replace...

I have a 2005 Astro AWD which I just put a used tranny in since the other one had burned up clutches in it and was slipping bad. After putting the used tranny in there I drove it and found that it was like I was hitting pot holes every now and then and so I suspected the tcc. Viewed the data while d...