Feels like wheels are engaged on turns in and out of drive or slow turns parking

What is your question?

vehicle stiffening when turning in and out of parking lots, driveway, etc. Took to shop and mechanic indicated that there might be a bad rear differential. Flushed fluid and replaced it. Drove it and still having issues. Don't know if rear diff needs to be replaced as I have read it could be transfer case or transfer case control module or encoder motor