Can or should these threads on a pinion be repaired?

I would attempt a repair but make sure have a quality die and the skills to use it.

 

yes, either a file type or die thread chaser.

best to take it to either a machine shop, or a truck repair garage.

of course, take the nut along as well for an inspection and thread chasing as well.

 

If it was mine, I would replace it and have a peace of mind. But that’s me NOW that I’ve learned through out my years of experience. In the old days, I would have just chase it down with a thread chaser and put a ton of lock tight on it.

Edit; forgot to mentioned, that nut kept getting loose on the pinion but that’s cuz I kept using the old nut with plenty of lock tight. Again, that was before I knew better.

 

Ring and pinion are matched sets. It is not just replacing the pinion. So as buddyd157 suggests I would take it to a machine shop. And buy a new nut.

 

May or may not apply, but my 13 spd trans. calls for an upgrade 750ft lbs torque instead of 500. Was sold a new nut that was supposedly different than original. Looks the same to me. Never did swap it out.

 

Those threads look knarly , plenty of hairline cracks in there too . I would bet .

 

I’m still waiting on instructions from the other thread, on best way to remove it. Lol. I considered doing mine once because of a leaking seal and end play. Sounded complicated for me. Decided to leave it alone. Glad you got it off. Seemed like a hard job.

 

Hard to tell with pictures. If it was just a couple flattened threads I'd just clean them up and send it. If threads were peeling or it looked like damage penetrated into the shaft I'd rebuild the diff.

 

They say crossed threads are better that no threads at all. I don’t think there’s enough left there to save.