Hi Tall Corn this is Riverrat in KC. I'm looking for a 4.7 toybox with marlin gears or just the gear set. I stripped mine last fall at SMORR and Marlin is on a 2 month back order! It doesn't matter if its a 21 or 23 spline input because my input is still good, I just need the low range gears. Any help would be appreciated. Thanks Eric 6602320981