MSM axles
#6
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I just did this swap. The axles look the same, but may be different. I did not remove them from the CV joints, so I really can't say for sure. What is different are the CV joints. They are larger diameter where they fit into the diff, about 2mm larger if I recall. So yes, you need MSM axles (CV's anyway) to fit a MSM diff.
#8
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The axles do not fit into the diff, the CV does. The axles fit into the (inner) CV joint. I can't say if the axles are different, but the splined end of the CV joint is larger where it fits into the diff.
![](https://www.miataturbo.net/attachments/miata-parts-sale-trade-5/35024-msm-axles-msmaxles001.jpg?dateline=1330113798)
That is a standard Miata inner CV joint & axle on the top, MSM on the bottom. On the CV joint, the seal area is the same, everything past there to the splined end is a larger diameter on the MSM CV joint. As I recall, 28mm vs 30mm.
![](https://www.miataturbo.net/attachments/miata-parts-sale-trade-5/35024-msm-axles-msmaxles001.jpg?dateline=1330113798)
That is a standard Miata inner CV joint & axle on the top, MSM on the bottom. On the CV joint, the seal area is the same, everything past there to the splined end is a larger diameter on the MSM CV joint. As I recall, 28mm vs 30mm.
#9
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Thanks for the clarification. When you said CV, I thought you were strictly refering to the joint itself. I thought that you meant the joint was more robust.
Correct me if I am wrong, but I considered the smooth and splined area to be axle shafts, and only the joint to be the CV, thus creating a shaft in multiple parts with the CV joining them.
Correct me if I am wrong, but I considered the smooth and splined area to be axle shafts, and only the joint to be the CV, thus creating a shaft in multiple parts with the CV joining them.
#10
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I thought that you meant the joint was more robust.
Correct me if I am wrong, but I considered the smooth and splined area to be axle shafts, and only the joint to be the CV, thus creating a shaft in multiple parts with the CV joining them.
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