480le Dead In The Water

[dieselsmoken33]

I finished up my cooling up grade and went to test drive it and only got R and then D for a second and then lost every thing. The funny thing that every thing worked fine before the cooling up grade. So I backtracked my self and noticed the tranny cooler lines are bone dry. Also noticed that the tranny acts like it has no but it does. So this means I'm get to pressure build up. What would cause this. I started cleaning up my grounds but I have a feeling thats its more than just grounds.

Thanks

 

[schulte]

What kind of cooling upgrades did you do?

 

[dieselsmoken33]

The cooling up grade was the newer water pump, t stat, and Max fan that was it. I did pull a dtc out and it was 59.