Front wheel bearings, 1984-1990, same part number.
No ABS sensor on the wheel bearing assembly.
Front wheel bearings, 1991-1996, same part number.
ABS sensor on the wheel bearing assembly.
Rear wheel bearings, 1984-1996, same part number.
There are 5 variations of the steering knuckle.
1984-87 are interchangable if the matching caliper bracket is used.
1984 - original design.
1985 - Larger mounting holes for the brake caliper bracket. ( M14 bolts instead of M12 )
1986-87 - With ABS sensor.
1988-90 - Different wheel offset and larger brakes.
1991-96 - ABS sensor mounted om wheel bearing assembly.