Drove the truck up to grandma's for easter and broke it on the way.
I've driven the truck to work for most of the past week without any major issues. I suppose this was the first real shake down run though. About a 45 mile drive, probably 30 of it on the interstate. Needed to test it under those conditions and knew that there was both a safe place to leave it and a ride back home if I needed them. Engine did good until I got off the interstate, and the bad was likely a fluke. Drive train, not so much, it's what forced me off the interstate.
About 4 miles from my normal exit I started getting a driveline vibration in the truck. Really not good caused me to slow way down and get off at first exit. Coasting up the ramp with lower engine and wind noise I could hear a sound hollow metallic sound that was obviously something rotating in the driveline. When I stopped I couldn't find anything.
Now as I was pulling off the interstate and finding a place to got stopped the oil pressure gauge acted a little wonky, fluttered a bit at low engine speed (idle IIRC). I'm chocking that up to a fluke. Oil was full, no other engine noises that one would expect from oil issues. Once engine RPM picked up it went away and no more problem for the rest of the trip.
Anyhow drove it the rest of the way, any damage was already done. Driveline noise was even worse when I got it pulled off on the dirt road heading back to her house. We're about 90% certain that a driveshaft joint let go, we just aren't sure which one. Front shaft, front joint is original to the Explorer. Front driveshaft, rear joint (CV) is brand new, but bought off of eBay. Rearshaft, rear joint is original to my Ranger. Rear driveshaft, front joint is original to one of them, but I'm not sure which. Front yoke needed to be swapped so dad did that while I was at work one day and reused one of the joints. I just found out today that the first joint he reused got messed up during the process, so it wouldn't surprise me if the second did too and just failed.
I'll be heading back up with the F-250 and trailer one afternoon to bring it back and start working again. I was really hoping that it was just finish AC and done for a while.