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: That info changes things.
: Considering that it had a previous
: blow-up, it's entirely possible that
: the carrier was damaged, possibly
: cracked, already.
: Was this a freshly "rebuilt"
: unit, used? Approx how much time on it
: since rework?
: Glen
:
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:
:
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: I considered it but can't convince
: myself
: that it could somehow cause the loads
: that would be necessary to cause that
: damage.
: With an open diff, I would be inclined
: to think that it would be less likely.
: The apparent absence of major damage to
: any of the cogs, and the amount of
: shrapnel, makes me thing that this was
: immediate.
: If it was something that was
: developing, in addition to gear whine
: and vibration, I would expect to see
: FODded gear faces etc ie wear.
: Is there any witness mark where the
: spyder shaft whacked the case? If there
: is, it could suggest that the carrier
: split immediately prior, because the
: roll pin is still attached. Once that
: shaft comes out, it's all over in a
: hurry.
: Glen
:
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:
:
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: I've held off speculating on the cause
: of
: failure... because I really can't come
: up with anything, based on what I see
: in the (good) pictures. Obviously the
: carrier pretty much disintegrated. The
: spyder gear shaft looks like it was in
: place, and there doesn't appear to be
: major gear damage, suggesting that this
: was immediate catastrophic failure.
: What is also unusual is a failure like
: this, with an open differential. Over
: the years I have seen a few failures
: similar, on race cars with sticky tires
: and locked rears, where there isn't
: enough left to make a determination of
: what the cause was...
: Glen
:
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: Hi.
: It's somewhat modified but I barely
: popped the clutch when it blew. Maybe
: only 4000 RPMs
: P.J.
:
:
:
: Hi. Have you considered the tire
: rubbing theory??
: P.J.
:
:
:
: Hi.
: I've looked over the damage and there
: are some marks on the case. It's hard
: to say if they are fresh or from the
: last time it blew up. Obviously this
: case had a hole in it from sometime
: before me and it was brazed up nicely
: and painted over on the outside. What
: is apparent to me though is that the
: dowel pin that holds the spider gear
: shaft in place was bent at about a
: forty five degree angle. Also I'm not
: sure how long that pin should be but
: after exploding it's about one inch
: long(seams short) so maybe it came out
: and the shaft came out too causing
: BANG. Does that sound likely?
: P.J.
:
:
:
Hi.
It was a used unit that I freshened up with new bearings and seals about ten years ago. It had maybe 10,000 miles on it since putting back together with all well used parts. I'm sure there was nothing damaged when I put it back together (although a small crack certainly is a possibility)and it ran smooth and quiet with no vibration right up till the day it died. I did however hear a snap or maybe you would call it a cracking noise a couple days earlier when I first began to back out of the garage. It did it only one time and I attributed it to the badly worn rotoflex joints.P.J.
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