Good idea. Headed there right now!
Yeah, Son ordered the cheaper axle last week, and it showed up today.. Considerably heavier than the one it 'may' replace!
Edit to add;
so, that was a lonnngggg rabbit trail to follow.
Looks like Sonny got on some 'parts house' page, which I confirmed 'RockAuto' shows 2 different axles. One with 41.1 mm journal, the other is 43.3 mm journal. No reference to what option would have either.
The respective bearings only differ by .005 inch on the OD.
According to the link you sent me, I cannot find any reference to the larger 43.3mm axles. anywhere.
They DO however, show the 2 different bearings, and seals!!!
Clicking on THOSE individual parts both show those 2 sizes fit 2007 and up Nitro. Why would they show 2 sizes of bearings, but only one size of axle shaft?!?
Spline, Overall length, all are identical on these shafts, it's the major diameter and length of that first 'step' is longer down the shaft.
As far as checking the housing #... they only show one 'complete assembly'. No reference to what axle shaft, bearing, or seal it's equipped with. Only if my axle housing has a certain 'tag' would the replacement fit. I imagine it's a certain gear ratio and type of differential. Hey, it's 13 yrs. old, and not all variations are probably available anymore!!
Looks like we'll have to hunt down a 41.1mm shaft. Nitro brand axles show one for $230, but I have to snag the tone ring off my original shaft