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And that is what I am wondering about. I am swapping out the transmission (project has been delayed several weeks); and I figure it would be good to replace the torque converter. There seems to be two variants of torque converters for this application, at least according to rockauto:
1) DACCO B29DGF Reman;
Trans. code 4L60-E; 1397 Stall, 30 Splines, 3 Mounting Pads, Paper Clutch; General Motors trans.