are 47re autos weak?

rustycowll69 said

maybe some of these Cummins people, who are unhappy with their 47re's, have modded their engines(which I understand is quite easy to do) beyond what their oem trans is capable of handling without being modified, too.

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Truer words for sure. Double the HP and torque, which is quite easy to do in a diesel, and forget to upgrade the transmission=lots of broken transmissions. This is true also with the GM Alison transmission, and the Ford Diesel transmission. The company I worked for in the past, makes hard core parts for these transmissions. They have a hard time keeping up with the orders.