4l80e. Transmission failure 1st trip for 2015

On my 02, I had a local performance shop rebuild mine. Now that being said, when they took it apart at 180k there was not much wear on the clutches. This is with the truck being abused the majority or it's life. It had been worked since day one and worked hard, that's why I got it cheap. Anyway the problem that I had was the torque converter not staying locked up. My problem was with the valve body assembly that went bad. I did lose reverse sometimes which also was a symptom. It would have cost me about 1200.00 for the new valve body and TQ converter, and a full performance rebuild was 1700.00 so I chose to rebuild the unit. The TQ converter from that era truck had some issues of cracking, which leaked fluid inside the unit. This prevents the lockup and other issues. The valve body assembly was going bad which caused the reverse not to work at times. But the 4l80e internally as far as forward clutches were in really good shape despite the abuse. If u have the 4x4 def check the pump rub. Take this truck to a trusted shop, if you were in florida I would send u to the shop who worked on mine. Btw when I had it rebuilt, I had them install a minor shift performance kit which was really nice for a firmer shift and after rebuild I will say the truck pulled better as far as tranny goes. The gears shifted quicker up the hills then before. Hope this helps, if u don't already know , the 4l80e is one of the most strongest tranny that was ever built. They use them in all differnt applications including racing. They are one of the best that I have used and very durable. Hope this helps,
Kris