Why the ARB over a Detroit...? Anyhow, if the ARB fits into the carrier like the Detroit does on a Salisbury, do it yourself..If you are handy with the welder it's easy to make the spreader tool. I fitted a detroit into my old 101 without touching any of the shimming. Spread case, remove caps. Remove and split the carrier. Remove guts. Fit locker. Rebolt using locktite and clean surfaces. Refit. As said before if it falls out there's something wrong!

