Is yours a Denali? Because I watched the dude at the trans shop struggle for over an hour installing mine and he had to bend the heat shield out of the way. He said the Denalis are a *****.Honestly the heat shield isn't difficult. It's 2 10mm bolts. No biggie
I believe both of my issues were installer error. 1. Make sure the circlip holding the servo cover is fully seated. It can look "in" even if it's not. And 2. Install the 4th piston inside the servo cover. Don't try to slide the cover over top of everything because it can get hung up on the seal and booger it up.
It's all back together and we're back in action so no worries now. Take your time and go slow.