WLtoys #10428 differential locker
thingiverse
This part replaces differential gearing to lock it in place for improved crawling performance. It is mounted on the WLToys 10428-B2 model. Durability has yet to be tested, but using PETG or ABS may provide better results. To access and disassemble the differential, refer to your manual. The printed part replaces gearing and diff axles as shown in the picture. This upgrade is suitable for both front and rear differentials. Update: testing with PLA material resulted in failure after just one run.
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