Originally Posted by Mudweiser
But softlockers and such like the truetrac are good for added traction but can still be one wheel wonders in a given situation.
Detroit Softlocker is another name for the venerable Detroit Locker and as such, is a full-on hard-core full-case automatic locker. It is not a limited slip differential like the Truetrac is.
That said, I would just install something like a Lockrite, Aussie, or No-Slip lunchbox locker up front. The Softlocker is a full-case replacement so the ring & pinion gear's backlash would have to be set up from scratch, but nothing would have to be changed with any of those three lunchbox lockers.
And for the D30, any of those three lunchbox lockers are fine and more than strong enough for up to the 35" tire size.