I think a bad torque converter is frequently the blame for a bad transmission. I picked my truck up from the transmission rebuild shop this week. When the transmission was disassembled, it was found to be in good shape. I haven't had the converter opened up yet.
The symptoms were as someone suggested already, pedal to the medal in gear, the RPM would go up while the truck speed slowly increased. The tranny fluid temp (from line) after the fluid left the converter would climb rapidly, and the tranny would run hotter than usual.
Long story as to why a stock rebuild tranny and converter was in my truck, but it was just under three years old. I can say it made a believer out of me that a stock tranny, constantly hauling a 4200 pound TC with my mods (see signature), will not last.
A tighter converter is always good with out trucks! It doesn't have to be a low stall, there is a difference.
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