I wonder if the part no difference has to do w/ the different final drive ratio??

jb should be perfect for that app. I broke one, too, when I did a swap this spring. it was on the good(?) tranny connected to the bad engine which is now in storage. I will cross that bridge when I need to.

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.