90-91.5 DSMs only had 3bolts attaching the rear axles to the hubs, where as the 92-94 AWD models had 4bolts attaching the rear axles to the hubs and the rear axle bars were thicker in diameter also.
90-91.5 DSMs only had 3bolts attaching the rear axles to the hubs, where as the 92-94 AWD models had 4bolts attaching the rear axles to the hubs and the rear axle bars were thicker in diameter also.