Join Date: Nov 2000
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Re: im a little confused
The Dana axles are generally stronger as the numbers go up, but there more to it than that alone. Ring and pinion size increases in the progression that infernox has set out, but depending on the donor, the number of splines on the internal axle and it's diameter will vary, as will the thickness and diameter of the outer axle tube. Within the axle series, such as a dana 44, there are other differences such as older 2 piece axles that are splined onto a hub at the outer ends and are weaker. As well, on front end, some dana 30's use the older small u joints like cj's did, and others have the larger 297x joints and are more desirable. Some front ends have axle disconnects that are troublesome as well.
Bottom line: If you find yourself an axle that you would like to swap in, tell us about it and someone will be able to advise you whether it's a good swap or not.