The manual shows you must split the differential to remove the pinion shaft from the center section. The pinion gear is an integral part of the shaft. The ring and pinion gears are a matched set and must be replaced together. :-(
Sincerely
Is it possible to get close-up hi-definition photos of the fracture surfaces? There could have been a pre-existing flaw, or inclusion, or fatigue crack, that initiated the failure. These are sometimes visible under magnification. Just a thought...
Sincerely
Thanks for the photos. I should have been more specific about my request... The photos should be as close up as possible and in focus directly looking at both fracture surfaces. Now having said that, there appears to be corrosion (brown marks) on the fracture surface which would have been internal to the shaft. If this is the case, this part was already in a weakened state and begging to crack where it did. I see no signs of torsional overload, and one sign of a possible fatigue crack initiation point, possibly caused by stress corrosion. Could also be a brittle fracture caused by a bending force (hitting a rock). I am no metallurgist! Better photos would provide a clearer view of the area and we could maybe see more clearer evidence of the crack initiation point.
Sincerely
I would call the dealer and just tell them while you were using it it broke, you truly have no idea what caused it and the shaft isn’t all bent up, the break looks clean to me. I don’t think the rock broke it, I think use did.
Even though it is out of focus in the first picture, you can see a dark spot at the top. Same with the drive shaft at the bottom of the picture, definitely a factory defect.
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