So I recently installed an 01 TCM in my truck, this morning I did like I always do went outside started my truck and let her warm up for about 15 minutes. When I put it in Reverse it felt like it was in neutral but down the driveway I went. Then when I was at the bottom I saw that No Gear was selected I put her in Park then back in Reverse then when the indicator showed Reverse it was blinking. I put her in park again and then back to Reverse and she was in Gear and she was fine. I tried to duplicate for like an hour starting and stopping. It didnt happen again. Could it be that she forgot the Garage Shifting and it is just an Allison Hiccup, or could it be my NSBU is going out?
but it's most definitely the NSBU Mike?
