I did mine with Detroit True Tracs front and rear. I switched to 4.88 gears with 35" tires though because i had to upgrade axles and carrier anyway. But, if you're looking to just add a posi carrier to the factory gears, you will probably be out of luck. Different spacing than Dana 44, and Not much out there without upgrading the axle to accept all Dana 44 components. If you do upgrade to 30 spline axles, tons of options out there. Any Dana 44 components will work.