I have a 99 SD and have a true trac in the front, and a detroit in the rear. Love them both, Yes you have to careful ion rain or snow as the *** end tends to kick out on ya, to avoid it I lock the front hubs and use the four wheel drive, it's a different truck with all that traction, night and day. and alot cheaper than the e-locker or ARB. and you dont have to do all the custom work for the air line or wires, just something else to get hung up on and get ripped apart, than you have no locker.
1999 F-350 PSD, 6 inch all spring, 35" Toyo load E tires, 140 gallons of fuel, Detroit true trac front, Detroit locker rear, BDS trans, banks billet converter, banks trans command, TS chip, banks turbo housing, wicked wheel II, FRx Kit w/black spring, Non-EBV Pedestal, diesel site coolant filter, 203 t-stat, IAH delete, 4" turbo back exhaust, 6.0 trans cooler, Riff-Raff wastegate, 1994 Ford f-350 ambulance, 7.3 IDI 40,000 miles, rear air suspension, full light bars, strobes, sirens ect. for sale