I completely disagree about lockers and their drive-ability on pavement. for example, I Detroit Lockers in my 95 F-350 and my 85 Toyota. It is nearly impossible to drive these on pavement unless it is straight.
When I had the locker put in I had to drive 30 miles home and barely made it. On every turn, the lockers would chatter like hell and the rear tires lock up. I nearly wore out my rear tires in 30 miles.Many times I nearly ended up in a ditch because the truck would not turn.
There is a reason that these types on lockers are for off road use only. Even I hard dirt the locker make it hard to turn.
They work great on the ranch, but we rarely exceed 10MPH and have no pavement.
Most rear end shops will not put in a Detroit locker on a vehicle that will see pavement.
If you want a real locker(not the ones Ford etc. puts in their SRW trucks), ARB is the way to go.That way you can disengage the locker on pavement, you don't want a full time locker on your everyday driver.
On the subject of LSD's, besides tru-trac, there is Gleason Torsen and Auburn Gear.
A lot of Tundra's are using the Auburn Gear with great results.
I have Gleason Torsen in the front of my 85 Toyota and it works very well, you just have t hold onto the wheel when it kicks in, especially with the locker in the rear.