My center support bearing is in need of replacement. I have looked everywhere and can't find my answer. When I look on summits website it only list the 1.378 i.d. Bearing. I have a 2000 2wd 1500 non hd. I know there are 2 different I.d. sizes. Would I be correct in saying that the 2wd non hd 1500 would have the smaller one? The diameter of my driveshaft is pretty small. Do not know if that would have anything to do with it.