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The main reasons I picked these diff covers up were that they were made by Spicer same maker as the axles, they have a drain hole & 2 fill holes which is nice since my rear pinion angle has been adjusted. I think being nodular iron they are supposedly stronger than steel but didn't play much...

Thx for the response Dirty Dog! Someone informed me that that isn't actually powder coating but is just a rough texture finish from being cast.

Thx for the response! When I purchased them they didn't have an option for the PC but they came that way. The mating surface where the gasket goes is actually smooth just not the inner side. I will be using Lube Lockers though.

I purchased some Spicer nodular iron diff covers some time back and am getting ready to install them and noticed that the rear cover powder coating on the inside didn't cover totally in one spot(see image). Before installing I just wanted to ask if you guys think it would be a flaking issue...