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Old 11-29-2022, 08:09 PM
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njsteve njsteve is offline
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Picked up the 3.54 diff today. Total cost was around $750. More than half of that was the bearing kit and seals.

Looks like Blackstone was right on the money. It was devouring the bearing rollers in the main pinion bearing, which was contaminating the fluid with iron.

That was also the "tinkling" sound I heard. The rollers in the main pinion bearing were probably around 75% of the size they should have been. And all the races were showing severe brinelling. The main pinion bearing race was bad enough that you could catch your fingernail in the divot at the 12 o'clock position in the photo.
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Last edited by njsteve; 11-29-2022 at 08:25 PM.
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Old 11-29-2022, 08:12 PM
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Here's the main pinion bearing. Notice how high the roller is in the first photo. And then how low it drops in the second. Now compare them to the third photo next to the low mileage pinion. You can see how worn the rollers are on the bad bearing compared to the low mileage bearing on the right.

That was the "tinkling" I could hear when I rotated the yoke and heard the roller drop to the other side of the cage slot. The damn thing is so loose it sounds like a tamborine.
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Last edited by njsteve; 11-29-2022 at 08:20 PM.
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Old 11-29-2022, 08:15 PM
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And the shiny, clean diff with the 3.54 gears all reset and ready to go.
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