Originally Posted by Gearhead61
There's no such thing as a locker that isn't housed inside the differential. Your best option would be a "lunch-box" style locker, i.e. one that replaces the spider gears inside the carrier. I'm pretty sure Aussielocker and Powertrax both make lockers for your 8.8. So long as you keep the ring gear in the same spot you should be able to reinstall your carrier without having to reset the gear mesh pattern. Just keep very close track of the shims in the axle and reinstall them exactly as you took them out.
Aussie only makes a locker for the 31 spline, not the 28. I don't know about Powertrax.