Diff Cover Experts Weigh In

[c20040215]

Except from an anecdotal point of view, where are all of the failed axles due to aftermarket covers? There are enough people here on the forum using non-curved covers that if this were really an issue given the temperatures and reduced oil capacity of D44 Advanteks running large tires, we would see multiple failures. Except we don't and even the welded covers have a "wedge" behind the ring gear.

I do not see how cover design can reduce flow as long as the oil levels are at least as high as the OEM levels. Banks' premise is that the curve keeps the oil running over the ring gear and increasing the gap reduces the flow. I would like to know how that is possible since the ring gear is going to ferry oil to the pinion no matter what shape the cover may be as it is the "oil pump" in a splash type system.

Banks did a great job of marketing--too bad there are no ASTM methods to compare his results against other covers.

Sure.
I'm not defending his marketing materials nor disagree with your points. I noticed the design differences between those companies and thought it is interesting.

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[CarbonSteel]

Sure.
I'm not defending his marketing materials nor disagree with your points. I noticed the design differences between those companies and thought it is interesting.

No worries. I think more often than not aftermarket cover companies "copy" OEM designs and this is especially true for casted covers. Fabricated covers would be more difficult to build the curve which is likely why they have a wedge shape and more or less mimics the curve.