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From left to right, these are the new Right-Trac and All-Lock lockers and the Silentek silencer replacement kit (all names are trademarked). John Zentmyer, the man who brought us the Lock-Right more than 10 years ago, invented all three. Just like their predecessor, these lockers use the original (open) differential case and therefore can be installed by just about anyone. Each has its own advantages, but the All-Lock is the most intriguing with its unique sprag system.

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