well ill say that 87-96 bronco and f-150 with an 8.8" axle are all 5 lug with 5x5.5 pattern. you don't want an earlier axle such as the 9" cause it tho it does still have 5x5.5 pattern, it doenst have the Vehicle Speed Sensor your 96 will probably need. you don't want an explorer 8.8" axle either cause its shorter and tho its 5 lug the pattern is different. don't know bout the later axles after 96
your gonna want to find an 8.8 axle 90-96 so it has a flange ofr the driveshaft instead of a yoke like the earlier axles