sibiryk

I installed tranny. I flushed once and oil wasn't looking too bad. I would say normal. When I took it for a ride I figured that after first it shifts directly to fourth gear. There is no any kind of abnormal noises. Converter gets locked as it suppose to. Also, I got CEL and "D4" is flashing. So, I stopped at AutoZone to check the code and I was told that it is P0171 and a guy said that it is a shift solenoid. When I check this code at home I found that it can't be code for solenoid. The only match is P0771 (solenoid E).
I'm not sure were solenoids are located. Are they outside or inside?
Also, where is solenoid responsible for 2 and 3 gear.