Taking name off the deed, keeping it on the mortgage - ruin my credit?

[Nicholas Henry]

Hey everybody, I'm in a situation I never saw coming, and hoping for a little advice. I bought a house with my ex, and after a few years, we split up (on good terms). She wants to buy me out of my share of the house, which I fully support. The thing is, our mortgage is at about 2.8%, and I don't have to tell you how much higher it would be if we refinanced to get the mortgage in her name alone. So:

Am I right in guessing that if I sell her my stake in the house and take my name off the deed, but I leave the mortgage alone (with both our names on it), my credit score would plummet? 

Thanks!