Lunchbox locker

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title: "Lunchbox locker" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["automotive-transmission-technologies"] description: "Automatic locking differential form" topic_path: "general/automotive-transmission-technologies" source: "https://en.wikipedia.org/wiki/Lunchbox_locker" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Automatic locking differential form ::

A lunchbox locker, also known as a pocket locker, is a form of automatic locking differential that is installed by replacing some components of the differential carrier with the components provided by the lunchbox locker. The cost of the lunchbox locker is reduced because it reuses the existing carrier in the differential. It is easier to install because by reusing the carrier, there is no need to replace the shims and bearings, or to re-measure the preload on the ring and pinion. Often, the lunchbox locker can be installed without removing the carrier from the differential, depending on whether the carrier pin can slide past the ring gear.

References

References

1. "Lunchbox Lockers - What is a Lunchbox locker?". Offroaders.com.
2. Trasborg, Pete. "Head-to-Head Lunchboxes Drop In Locker Shootout". Jp Magazine.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::