Notes: Bearing kit, Contains: LM501349 and LM501310. J-100 model, spicer 27AF (inner or outer) or spicer 44-1 heavy duty axle (outer). J-2500 or J-2600 model, heavy duty (outer) or except heavy duty axle. J-3800 model, outer (dual rear wheels, heavy duty axle) or light duty. J-4500 or J-4600 model, spicer 27AF (inner or outer) or spicer 44-1F axle (outer). J-4700 or J-4800 model, outer