Detroits are great offroad, but on the street, not so much. In the slippery stuff, they outright SUCK!!
Previous to my two current rigs I ran Detroits and lived with the poor onroad manners. One was a Crewcab on 33's, one was a RamCharger on 39.5's setup for the rocks, and one was a springover FJ60 on 35's
All of them basically drove the same. Naturally as the tire height increased and the wheel base decreased, everything was exaggerated, but the same quirks were still there.
Powering through a corner (not on it, just off idle to keep speed up on a mountain highway 45 mph, nothing tight (highway 50 for those who are familiar), let off the gas, and HAVE to correct or end up in the inside lane. Not sliding, just the Detroit being locked and thereby causing a power "push", letting off the gas makes you go where the front tires are pointed, doesn't take much at speed.
In the wet (don't get much ice around here) power sliding is something you do, unless you idle off of corners (slight exaggeration, but you get the idea)
coming up to a stop from a straight street, turn and stop to go down a side street. BANG!!!!!! the locker "unloads", funny to see the person on the corner who thinks you just blew the driveshaft out of your truck, but gets old quick.
These are the things that bugged me about it. But not the only things.
Basically in a turn the inside tire is slipping under power, and therefore the Detroit locks, and you get that wonderful chirp that every teenager loves to hear (as do tiresalesman) If you're really easy on the gas it can be avoided, but its there.
If you can afford a selectable locker, do it! The upkeep is nonexistent when compared to the day to day of a Detroit.