Maghytech diff cover ?????????

[mymtnhauler]

Just installed my new Maghytech diff cover on my 05 3500 dually 4X4, and drove it about 50 miles yesterday. This morning I checked the oil level and there was quite a bit of what looked like black sludge on the end of the dipstick where the magnet is! Is this normal for the 11. 5 AAM? And if not then what should I be looking for. Thanks.

 

[Motorhead]

Don't know why the crud other than the new oil stirred up something on the bottom of the dif. But why didn't you go with the Genos Maghytec cover with the oil level window?