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RiggerWings
Joined: Wed Nov 15th, 2017
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My FX4 has the 4.10s and I was able to wheel with 33s with no power issues. 4.56s would be awesome, you'll have power for days to turn those tires.
There's plenty of vids on youtube on how to install and shim a diff. You can likely "rent" the magnetic micrometer (for the lash adjustment) at your local auto parts store. If you're buying gears though, make sure to get the master install kit with all the shims.
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-John
2011 Ranger Sport 4x4, daily
2008 Mustang GT, garage queen
2013 Mazda CX5, grocery getter
2018 Harley Davidson Road Glide Special, the toy