RE: How to adjust adjustable diff for FG?
I got the 4 plate diff 8501/05 which is a big improvement over the 2 plate...with that one you screw both screws in to lock more adjusting as per hellya's post and out for less...even backed right off the diff will lock up some (10%) when one wheel spins as the spiders are thrown against the second set of friction plates...a true LSD...real happy with mine. It doesn't have the diff ring retaining screw but a band of heat shrink to seal the hole[&:]