My locker's dead

My Detroit locker is kaput... Didn't like its rather abrupt and noisy on and off transitions anyway. So I just bought this brand new Ford Racing 8.8" 31 Spline Traction Lok Differential M-4204-F318C with Carbon-Fiber Plates from Blue Oval on Ebay and I'm wondering if it'll last awhile with the 500 Lbs of torque (flywheel) my engine is capable off. Did I make a good choice?