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I have just finished changing the oil on a "new" differential for my '76 dart. While I was prepping to take the old one out and replace, I noticed oil leaking from the front of the pumpkin....Pinion Seal. Does anyone know what size the nut is that attaches the yoke to the pinion shaft?

I'm fairly new to this dangerous addiction of rebuilding old Mopars. Long story short, My '76 dart custom /6 has sat (in various locations) for at least a decade. I got it running today!!!!!! Here's the question. Old diffy is shot (or at least I was told so by the mechanic before I...

I have a 7.25 differential in my '76 dart. I've been told if I go up to a 8.75 that it is a better differential. Also that I would have to shorten the drive shaft. What if I found a 8.75 on an a-body and also snagged the shaft from the same car. Will that work?

Don't know if this question has been addressed before or not, but I have a '76 Dart. The differential went out while I was driving about 7 years ago. I finally am ready to get it up and running again. Here is the question. It has a 7.25 differential. Is it better to replace the differential...