Lockers
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SL GM8.5-28 - Spartan locker for GM 8.5" with 28 spline axles, includes heavy-duty cross pin shaft.
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SL GM8.5-30 - Spartan locker for GM 8.5" with 30 spline axles, includes heavy-duty cross pin shaft.
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SL XP-GM12 - 12 bolt GM Spartan locker cross pin
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ZK GM8.5-HD - USA Standard Master Overhaul kit for the GM 8.5 differential with HD posi or locker
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ZP PGM8.5O-3-28 - Posi for 8.5" Oldsmobile 28 Spline 12 bolt
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YGLGM11.5-30 - Yukon Grizzly Locker for GM & Chrysler 11.5" with 30 spline axles