In this one, I replaced the diff oil on Honda TRX 520 this procedure will be the same for the 420 and simmer for every Honda ever made. If you have any questions leave them below thank you for watching.

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Oil:

TOOLS I USE!!!

DeWalt Impact/Drill Combo: amzn.to/3u4gwqF
T-Handle Allen and Torx: amzn.to/3KTHRSF
Socket Set Kit: amzn.to/41Om6d1