Maybe I don't understand the question. We are talking about making a FF 44 right? I built one that was 30 spline with 30 spindles and it worked great but what Gordon said is very true. If the housing flexes enough to get the axle to rub on the spindle that is a bad thing.
Somebody correct me if I'm wrong, but if I'm not mistaken you can get warn FF kits that have thirty spline axles. I would assume that you could call warn and find out what spindles they are using for these kits. I was thinking that they used a Dana 60 spindle of some sort, since thirty spline axles on a 60 and 44 are the same diameter. (????)
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