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Unread 2016-10-09, 11:12 PM   #1
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Default Let's talk carrier bearings

Mainly in reference to European cars.

Is it the carrier bearing that goes out or is it really something with the driveshaft that causes the carrier bearing to go out, thus requiring the replacement of the driveshaft assembly?
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Unread 2016-10-10, 09:31 AM   #2
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I had to replace mine on my old E36 M3 but only because I did this to the driveshaft...

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Unread 2016-10-10, 04:22 PM   #3
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Pinion bearings would be more likely to go out if the driveshaft were at fault (unbalanced, binding, etc) VS the carrier bearings. The carrier bearings take the load from the pinion primarily (turning and resisting turning) - the carrier tries to climb up as the pinion drives it putting the load on the bearings - think of it this way - if it weren't for the pinion then the carrier bearings have a lot less load on them (and a tiny load if it's IRS)
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Unread 2016-10-10, 04:44 PM   #4
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Generally it's bad u joints that cause the rubber isolator of the carrier bearing to fail.

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Unread 2016-10-10, 04:45 PM   #5
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Quote:
Originally Posted by bwiencek View Post
Pinion bearings would be more likely to go out if the driveshaft were at fault (unbalanced, binding, etc) VS the carrier bearings. The carrier bearings take the load from the pinion primarily (turning and resisting turning) - the carrier tries to climb up as the pinion drives it putting the load on the bearings - think of it this way - if it weren't for the pinion then the carrier bearings have a lot less load on them (and a tiny load if it's IRS)
We arent talking ring gear carrier bearings here. We are talking about the carrier bearings of multi piece driveshafts.
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Unread 2016-10-11, 02:19 PM   #6
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I know they do this to keep vibrations to a minimum. On a lowered vehicle, the pinion angle change will eat up the carrier bearing pre maturely. There are a few factors to it that can make them fail. Being around bagged/lowered/lifted trucks forever, see it all the time.
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