I have a MSM center section that I am going to swap into my factory '99 housing. I know the half shafts inner section is 1mm bigger than the non MSM shafts and I have seen evidence here that the axle shaft seals are different. The problem I am running into is Rockauto shows the same part number for the axle shaft seals for MSM and non MSM. Does anybody know the Mazda part number for the MSM axle seals if they are in fact different?

 

mazda only lists 1 PN.

 

Thanks for the info.