I'm another victim of this sorry saga.
went to start the Jeep this morning and the opda was squawking its head off, so shut it down immediately
been following this thread for some time and have been removing the opda every few thousand miles when oil changes are due to check pinion wear and to make sure the target wheel spins freely and until now all was well.
pulled it today and found the target wheel was tight to turn but the pinion was ok. a little wear but no different to many distributors I have seen.
dismantled it and the spindle where it's in contact with the top bearing dry and had a black carbon build up on it so no wonder it was squeeling.
polished the shaft with emery. it had no measurable wear and did the fog mod, put it back together now runs smooth.
I have been a gear head by profession all my working life and this is one of the worse designs I've ever seen. an absolute disgrace LDI. my advice is to do the fogmod sooner rather than later.
now just have to work out how often to regrease it, but will be pulling it every oil change to inspect it as before anyway.
its winter down here where I live and this morning was chilly 10 deg C. that seems to be the common catalyst of when they start binding.
Jeep has about 100,000 kilometers on the odo, thats about 60,000 miles for those interested
and thanks willydigger for consolidating all this info
"I like a man who grins when he fights"
— Winston Churchill..