Mark's in Australia sell a 2.85 low gear set. They've had 3.15 in the past. Look up Toasty or Josh on Adventure Driven Design (.com), as I believe they're marketing the kits.

1988 Mighty Max turbo 2.6 service body
1980 Power Wagon W400
Sundry Mitsubishi Montero Gen 1 parts, Gen 1 and Gen 2 Max parts
Parts vehicles: 89 LS Montero 4-door, 2002 Sport AWD
For Sale: 1989 Power Ram 50 extended cab, #277 Montero