Ahh...bother to check the manufacturers website first? Its my understanding that they are two completely different systems, from totally different product lines with different part numbers. Why else would the manufacturer's site state ; It combines the smooth operation of a limited-slip differential, with the traction performance of a locking differential. A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials. Special gear and spring design reduce the backlash and therefore driveline windup. No Slip Part #92-0785-2805
Lockrite ; the brute force characteristics of the Lockrite Locker limit general application in less tolerant and more mainstream applications. We recommend the LOCK-RIGHT for vehicles that are primarily driven in severe driving conditions or are used for recreational off-road. Lockrite # 1920-LR
That being said, I'm also looking at a Detroit Trutrac, Yes, I know its not a locker. I'm also considering the front axle, so I wont only have 3-wheel drive.