As per Webster dictionary Abbreviation. The differential is. "Chunk" The one pictured above would be called "Junk"
Most 8 3/4's That destroy themselves are not back braced and have long factory axle tubes. The tires flex the tube causing the axles to pull the carrier back and there goes the pinion climbing over the ring gear. Some use billet caps and studs to help hold the carrier forward. I found a good strong brace always worked for me.. Our new housing brace will go flange to flange and the U-bolts will go through the brace.