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Nice work!
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Outstanding! I replaced one side bearing, that was easy. You really dug into it.
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Strong work. I had mine totally rebuilt last year.
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Awesome pics and job. If you dont mind, what was the mileage? Was there a maintenance issue? Personally, I dont follow the longe fluid change interval recommended so I changed mine much sooner. With proper maintenance, the front dif should have lasted well over 100K before a rebuild. Anything unusual with this one?
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wow intresting! i only get a Whine at a Certain speed with my Summer on, but not with the WInters.
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I very occasionally get a bit of howl slowing down, but only on certain road surfaces. Might be harmonics?
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Mine started to whine at highway speeds before it failed... it was very subtle.
In the final stages of failure, there were two additional symptoms: 1. Leaking. It wasn't significant, but there were a few spots on the garage floor. 2. Noise. It sounded like a slipping belt coming from the front of the car, most noticeable when decelerating. A rebuild is a much, much cheaper option than a replacement. A dealer will typically replace the entire unit rather than rebuild it. The part alone is close to $7,000. |
Any indication of failure whatsoever and mine goes into the metal recycle bin.
Useless. |
Originally Posted by KrazyK
(Post 10842973)
Awesome pics and job. If you dont mind, what was the mileage? Was there a maintenance issue? Personally, I dont follow the longe fluid change interval recommended so I changed mine much sooner. With proper maintenance, the front dif should have lasted well over 100K before a rebuild. Anything unusual with this one?
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Originally Posted by wwest
(Post 10843668)
Any indication of failure whatsoever and mine goes into the metal recycle bin.
Useless. |
Interestingly the AWD system on the 996 wasn't designed for additional traction in slippery conditions or winter driving. It was designed for improved performance on dry pavement. Your best bet for winter traction is proper winter tires, not the AWD system. The viscous coupling only drives the front wheels if there is a speed differential between the front and rear wheels, such as when the rear wheels are slipping. The PSM system prevents the rear wheels from slipping. Therefore, the front wheels don't do much in winter conditions. On the track or when cornering on dry pavement, the speed differential between the front and rear wheels allows the front wheels to engage and help to pull the car through and out of the corner more aggressively than a RWD car.
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The great thing is that you can remove the AWD components for repair and still drive the car =)
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Originally Posted by Dennis C
(Post 10843852)
Interestingly the AWD system on the 996 wasn't designed for additional traction in slippery conditions or winter driving. It was designed for improved performance on dry pavement. Your best bet for winter traction is proper winter tires, not the AWD system. The viscous coupling only drives the front wheels if there is a speed differential between the front and rear wheels, such as when the rear wheels are slipping. The PSM system prevents the rear wheels from slipping. Therefore, the front wheels don't do much in winter conditions. On the track or when cornering on dry pavement, the speed differential between the front and rear wheels allows the front wheels to engage and help to pull the car through and out of the corner more aggressively than a RWD car.
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the bearing cage blew apart. his front diff had only 60k on it. |
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