This is the third one and less than a thousand miles (help)
After the first one shearing off I got a new pump another high-volume and another intermediate shaft from a machine shop it lasted a few days. And sheared off at very low speeds and RPMs I Googled it and found that they recommend a hardened intermediate shaft because of the drag of the high volume pump. So here's the box to the racing hardened shaft I got for 80 bucks I put it in Friday night with another new high volume pump today again at low RPMs this is what I got. I'm suspecting I should have got a higher capacity filter I intended on doing a boil change in a couple days so I went with the cheap one. I bet I'm going to find out I should have been going with something different and maybe even some thinner oil 😢

 

Wow, for years I used stock drives without a failure, 7000 rpm and 50w racing oil.

I'm thinking some kind of alignment problem?

 

I am Kind of with Iowan... But my other question is, If you use a drill and a priming shaft. What kind of oil pressure is this thing caring and how dose the primer toll and the drill handle the load?

I have only broken one of those in all my years of working on motors. The cause of my failure was a piece of plastic got sucked up into the pump and froze up the pump and twisted off the shaft.

 

The only thing I can thing of is that someone did not install the dist bushing correct or burnish it to size ???

 

I would not think it would be a distributer problem. The shaft is breaking below the drive gear. I would drop the pan and see if the pick-up tube is restricted. It may not be a pressure problem. It may be a suction problem. Keep us posted. Good luck

 

If it were me id just replace your pump. Get yourself a Melling pump and a Mopar Performance shaft, you'll be good.