General_Vodka
1000 Posts Club!
The erosion looks like fluid related. This is the OEM $100 coupler. Not kidding new one cost me $100. I will try to track down what caused it, the coupler should last forever for $100 lolI wonder if the coupling was damaged during the wreck, perhaps that's how you got the flakes.
Or maybe our couplings are just cheap, and eventually become brittle and start flaking regardless.
Total unfounded guesses on my part.