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I purchased a used Getrag 3.92 differential with 1 used axle. I purchased Axle 4578732AE new from Steve Whites dodge.
Is 4578732AE the right side axle?
I have what I believe is the left axle. It is shorter then the 4578732AE, the splines are the same but the diameter of the axle between the cv boots is larger. Is this a problem?
 

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i am not 100% sure but i believe one side is shorter than the other if i am not mistaken.. now which side i don't know
 

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Yes one side is longer then the other, it was designed that way to change the harmonics from one side to the other side in an attempt to get less wheel hop.
 
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