tjkamp

Yes the front takes less fluid than the rear. While they are both 44s the rear 44 is a larger housing. It takes more fluid.

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ronjenx

And with the rear, some of the additional fluid goes down the axle tubes to the outer bearings.

Cheemsaf

Yes, I can attest to only fill to a level just above the bottom of the axle tube, and not to the aftermarket fill hole. If you fill to the fill hole on a "higher capacity" cover then you're asking for a HUUGGE mess on the bottom side from the excess being blown out the breather tube. I won't make that mistake again.

I'm assuming the fill hole is higher on the aftermarkets to actually compensate for a greater pinion angle to correct the driveshaft angle on lifted jeeps...so the oil won't spill out with the 'lower' OEM fill hole.

Mark Doiron

That is correct. And the hotter it is, the more likely that mess. Mine didn't occur until I drove through 113° temps in Tucson. Learn to fill diffs to proper level.