What do the experts think

[Brandon-w]

Alrite guys here's some pics tell Me what you think went wrong. Looks like bad casting to me. I've never seen spiders snap in half. I've seen them eat themselves. Oil was good no foreign objects got in to it.


Sent from my SM-G981W using Tapatalk

 

[lpennock]

I would agree with your assessment.

 

[Brandon-w]

Getting ahold of Moe's is a pain rite now too. Can't order through their website because I'm Canadian and they only give us shipping options and no one answers the phone there. [emoji849]

Sent from my SM-G981W using Tapatalk

 

[turkeybird56]

I would agree with your assessment.

^^^^^^^^^^^^^^^^^ DITTO ^^^^^^^^^^^^^^^^^^

 

[HEMIMANN]

This macroview appears most likely suspect. I didn't seen unusual tooth surface wear or galling indicative of overheating / over differentiating (tire spinning), nor wear on the bearing bore. If it were overloaded by shock, one would also expect to see shock impact on the tooth profile. I didn't see any.

A microscopic examination of the fractures would be useful to see if porosity is present, or contaminant inclusions, that exceed the ASTM limits for the material.

 

[Brandon-w]

This macroview appears most likely suspect. I didn't seen unusual tooth surface wear or galling indicative of overheating / over differentiating (tire spinning), nor wear on the bearing bore. If it were overloaded by shock, one would also expect to see shock impact on the tooth profile. I didn't see any.

A microscopic examination of the fractures would be useful to see if porosity is present, or contaminant inclusions, that exceed the ASTM limits for the material.

Yeah it was not spinning excessively or anything like that, no shock load I would have definately noticed that. I don't do drag launches or anything like that usually rolling before I hammer the throttle. It's going to get a trutrac no more spiders and friction modifires to worry about.

Sent from my SM-G981W using Tapatalk

 

[indept]

^^^^^^^^^^^^^^^^^ DITTO ^^^^^^^^^^^^^^^^^^

I DITTO your DITTO.

 

[goldtr8]

Those are fatigue cracks. My guess something not correct in the hardening and cracks started at machining marks which are a stress riser.

 

[stembridge]

I had that exact same failure, but it was in my 1971 Vega that I'd repowered with a Buick V6 while in college. Was showing off and did a "rev-and-drop" that ended with a bang, followed by a diff rebuild.

Other than the failure looking the same, my experience has nothing in common with yours. It just brought up an unpleasant memory, that I can thankfully now laugh at!

es