Why am I shredding 7a distributor gears?

[Sparkyjack]

Last year on my way home from Carlisle my car died on the road. I had it towed home and after too much time poking around I figured out that the distributor basic timing code was caused by a stripped distributor gear,
I replace the gesr with another bronze 034 gear and thought it was a fluke.
Just prior to Carlisle I noticed a grinding sound on startup,it lasted for about 2 seconds after releasing the key, at the time i and other thought it was the starter bendix.
The sound is back.
I'm about the pull the distributor and fully expect to find a another torn up gear.
Any suggestions why this isn't happening?

Jack

[Mentosman42]

Did you check the distributor itself? If it isnt spinning freely it is going to pass that force to the gear and that could cause problems.