Detroit locker

May be relative after you install it - I have a Detroit Locker in my 427 Cobra replica. I've noticed that if the air pressure in the rear tires is unequal side to side by as little as 3 pounds the rear will have a slight jerk to the right with every shift (Toploader 4 speed). Also, get ready for the little clunk as you go around corners and the locker unlocks and relocks. Other than that, you've got a great piece.
I had an older friend in Macon years ago who was a retired engineer from Ford. He had a really nice collection of Ford muscle and police cars. One was a 69 428 SCJ Mustang. Factory 4 speed and detroit locker with 4.11 gears. This was back when we were in school in the early 80s. Then, it STILL had the original Firestone Wide Ovals on it. He said the detroit locker with the Wide Ovals was a recipe for disaster on wet pavement. lol