[Ironangel]

The horseshoe type bearings are Pillow Block type bearings. The teardrop or hanger type carrier bearings are indeed, Clamshell type hanger bearings. HO455 is correct in that the clamshell type bearings were used on automatic transmission C/10 and C/20 trucks. My driveline shop specialist explained that the clamshell type carrier bearings were only installed in trucks that had single non-slip rear shaft applications. The problem with the clamshell type carrier bearings is one, they were located wrong on the prop shaft which limited their flexibility either fore or aft. And two, the "Poly" filled clamshell type were used on non-slip joint rear shaft applications where they self-destructed often taking out a pinion bearing and or the tail shaft bearing in the transmission with them. And three, the Chinese crap is just that, bent crap with bogus spot welds that are guaranteed to fail. I just took a 3/4 ton two piece shaft in to have a National Bearing Clamshell type carrier bearing installed along with shortening the prop shaft and installing 1350 yokes for my drag truck. The National carrier bearing is made in China (because nobody makes them in the US anymore) but is made with a thicker gauge steel, a higher quality rubber insert, and my guy welds the joints at the top making the carrier stronger, not bullet proof but stronger. I have two shafts, one on stand by, when one fails I will go to a slip joint rear shaft and be done with the shenanigans and fears of those Chinese made POS flying apart at 125 mph!