Thanks for the reply!
Transformer I installed: https://www.amazon.com/gp/product/B07GND8RMQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
I'm getting 17.8 volts at the transformer. 17.6 volts at the chime, and 17.5 at the door. I have a rear button wired to my chime, I tried...