Engine oil pressure is 60 @ startup and drops to 50 @ operating temp. She's due for an oil change this weekend - will inspect filter.
However, given the variables listed in my first post, I have my doubts about anything engine-related. I just don't know anything about automatic trannys to know what would cause this sound that presents only after the thing is warmed up after driving a bit.
I was hoping somebody w/ trans experience could shed some light on the inner workings of the beast.
95 K2500 6.5TD, Ext cab, short bed, 123K, FSD Remote, minor overhaul @ 123K: new injectors, glow plugs, glow plug relay, injection lines, heads, exhaust manifolds, harmonic damper & idler damper, water pump, (timing chain at 3/8" play) 4" exhaust, K&N air filter, CDR valve, trans cooler lines, alternator. Dead Kitty & deactivated EGR. (MPG: 11.5 before work listed, 13.5 afterwards & 17 w/ Marvel Mystery Oil)