You do not have an open carrier, that's what he is saying. You can't install it in the GN rear. You will have to change the entire center section of your rearend with a single track open carrier and then add the mini spool. That will require an install kit to get the gears back in to the correct depth, so there's another $100. They are junk. You dont want to use your axles either. You will need aftermarket axles or that will be your next weak point. Basically your gonna end up changing everything in the housing to put a mini spool in.
Toofastforyou is running a full size spool...big difference
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