Re: axle splines-why is more better?
Actually, back around the 70s, SAE came up with a 'standard' size spline used for any splined shaft. All the splines on any axle using this 'standard' are the same, to increase shaft diameter you increase the number of splines. There are a few exceptions to this rule, the most common being the GW 14 bolt, which has 1 9/16 diameter shafts, but is only 30 spline. Also, shaft diameter is measured as the 'major' diameter, which is the length across the outside of the spline, as opposed to the 'minor' diameter which is the diameter on the inside of the spline.