Been offroading over the weekend and busted rear crown wheel. While I'm at it, I want to replace the crush sleeve with a solid spacer but don't know which one I need to order. Vehicle/axle in question is an LJ79 with o.e. 4.88 ratios (thin type crown wheel / offset pinion). Seems like the options are '4 cyl' or 'V6' , so which one is it ?