Axle self destruct, why?
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Elder User
Joined: Oct 2004
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Axle self destruct, why?
I have a friend who drives a 2002 F250 SuperDuty PSD with 4-wheel drive. The rear differential recently self destructed. After dissasembly, it was discovered that one of the bolts on the drivers side bearing cap sheared off, bounced around and broke a few teeth off the ring gear and the pinion gear, and the drivers side carrier bearing failed as well. This Truck has 96k highway miles, used very seldom for towing, never offroad, has had no mods to the differential assembly(i.e. lockers and the like), and has 3.73 gears. Does anyone know what could cause this? Is this a common problem? Ford told us the powertrain warranty doesn't include the rear axle assembly, so we had to eat the cost of repairs entirely.
Cargo Master
Joined: Aug 2004
Posts: 2,899
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From: Lynnwood, WA
Hmmm, I'd tend to think the rear axle *is* part of the powertain, but....
How much did he drive on the axle while it was failing? I had a rear axle problem in '95 Bronco, and after noticing the noise, I drove only like 1/2 mile just to get home and started to fix the problem. I was lucky that most pieces in my case were small enough to settle at the bottom and didn't cause much collateral damage.
How much did he drive on the axle while it was failing? I had a rear axle problem in '95 Bronco, and after noticing the noise, I drove only like 1/2 mile just to get home and started to fix the problem. I was lucky that most pieces in my case were small enough to settle at the bottom and didn't cause much collateral damage.
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Elder User
Joined: Oct 2004
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I am going to say he drove about 45 miles on it once he noticed the noise. He was out in the boonies when it happened, so he didn't have a lot of option. At first, he thought it was the tranny, and he was trying to make it back to the shop before it died altogether. It wasn't until he got it in that we determined it was a problem in the rearend, but by then the damage had been done.
Cargo Master
Joined: Dec 2003
Posts: 2,735
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From: Sunny Florida
Does it have a factory trac loc? I have seen 9 inch trac locs break the covers and also break the bearing cap in half. I have seen rear axles blow up from the spider gear shaft bolt fell out causing all kinds of problems. Did the axle still have fluid in it?
.......call another dealer or ford warranty department
Posting Guru
Joined: Jan 2005
Posts: 1,299
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From: The Vieux Ford, Kansas
I have seen two bearing cap bolt breaks and after taking the axle apart i thought both of them were due to over tightened bolts (broke the two bolts on the other cap tryin to get them out both times), factory mistake mabey (one was an 8.8 that had never been apart). For some reason people just don't like the touque specs.
-johnboy
-johnboy
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