I have a 73 K5 that I just replaced the trany on because the last one broke at the top left mounting ear where it bolts to the transfer case, is this a common problem? I was wondering if anyone has run across modifications to reduce the likelyhood of this happening again. I just put in a built TH350 that hits so hard from second to high that I'm worried about any week points. The old tranny and the new do not have "4x4" cases but everone I spoke to says the only difference is in the bell housing area where the 4x4 model is beefier for an aluminum "dust cover". I was thinking of making an adapter or installing another crossmember to support the tranny at the normal 2 wheel drive mounting points instead of relying on the bolts that tie it to the transfer case.