1 GEN troopers 84 to 91
mostly have 4.55s
84 is the oldest trooper yearodd balls are as fallows.......
1987 diesel troopers have 4.11s theres only 200~ of them, this should be a 10bolt sence 88 was the first 12bolt year,
1989 there was a RS trooper, commen out side the USA in all years, but rare hear, they have 4.77 gears and mabe a LSD
its a extra short 2 door trooperalso from 88 to 91 any trooper with the over sized tire pakege should have 4.77s as well as a
very small chance of a LSD
there is a combo of parts that can change a 88/91 12 bolt rear end to a 4.11s
but you need the 4.11 gears from a 88/95 4x4 or 4x2 2.6L auto trans isuzu truck.
having the auto trans makes serten its 4.11s not, 4.30, 4.55, 4.77 gears
from 88 to 95 all 2.3L powerd trucks are 4x2 and have a 10 bolt. so thats why it must be from a 2.6L truck.
buy doing thisyou have all origanl parts in a combo that was never sold as one rear end off the lot
theres no way to put 3.73/3.42s in a 12 bolt, short of having $$custom$$ gears made.
as far as the rear disc brakes calipers working on 4x2 luv diffs im gessing as well as going with my gut,
NO but thats a gess