The most rugged positive locking differential, Detroit is the locker of choice for most four-wheelers wanting to tackle those severe off-road conditions. This automatic locker replaces your stock carrier assembly and provides 100% traction 100% of the time. With the introduction of the SofLocker, Tractec has been able to reduce some of the old bangs and quirks synonymous with the Detroit Locker, however, you can rest assured that when you need traction the Detroit SofLocker will deliver!