The 4.77:1 gears will fit 88-97 Troopers, 89-94 Amigos, and pickups with disc brakes. It also appears that they will fit the Vehicross. Externally the rear axle appears to be the "older" Isuzu 12-bolt axle. 98+ Troopers have a newer 12-bolt that isn't compatible.

Dan R's Vehicross rear axle:
http://tad.grosvenor.org/gallery/Mis...ation/IMG_0517

Conway's 2001 Trooper rear axle:
http://tad.grosvenor.org/gallery/Mis...01_trooper_dif

88 Trooper diff: (sorry for the mud) http://tad.grosvenor.org/gallery/MiscInstalls/slider9

88 Trooper diff again:
http://tad.grosvenor.org/gallery/KYSep01/IMAG0024

Does anyone have a VX rear axle that looks like the 2001 Trooper axle and not like Dan's VX axle? Mine looks like the older 12-bolt. (like Dan's).

If you find a set of the 4.77s, they are quite rare. I got my set out of an 89 RS Trooper. 1st Gen Troopers with the wide tire option apparently came with the 4.77 gears, and no other Trooper did.

Some 4cyl 98+ amigos or rodeos came with 4.77s, but that doesn't matter to this forum because they have a dana-44 rear axle and the gears don't interchange.

-Tad