Doctor Diff's 8 3/4" Helical Gear Sure-Grip ("Sure-Trac") LSD
When I built my 489 case I put a spool in it. All brand new stuff from dr.dif. but as you can see where there's a will there's a way! LOL one more call to Dr diff for Dana Parts LOL as you can see if you have a will this is the way, they're much bigger.. along with bigger main caps..
Had $1,200 in each...
Dana is still happy...