After cruising around last Sunday, I popped the hood and noticed this sticky streaking coming from behind the voltage regulator. I took it off and all the epoxy has melted out leaving a nice mess on the firewall.

Now, this reg was on my car when I got it so it's at least 12 years old, it's a dual field alt, Mopar V/R Part, was charging fine, amp meter stable, verified 14 volts at battery at high idle, engine didn't overheat, etc. In fact, I drove the car around a little even after I noticed the streaking, it still works. A new Mopar Restoration V/R came in the mail today and before I just change it out, I was just curious if this may be a symptom of something else or just the way they fail sometimes? I've never heard of this happening. Any thoughts?

Thanks