Quote:
Originally Posted by englishtom1596
the plastic cog has nothing to do with the shuddering issue. The cog strips and causes ABS, Brake and 4x4 light to come on (i believe that's the 3). As said above, if its shuddering in turns then its a mechanical failure of the clutch assembly. You can try replacing the fluid and resetting the T-case adaptations but most likely it'll need to be rebuilt or replaced
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That is not correct. When the plastic gear strips, the adjustment arm in the transfer case will stay locked in its current position which is usually with sufficient pressure on the friction discs to cause the shuddering during slow speed turns.
This can easily be confirmed with a BMW OB2 reader like Foxwell NT510. It will show the current angle of the adjustment arm in the transfer case and it will not change when turning from very slow speeds as it should. On Mine the stripped gear did not cause any of the ABS/Brake/4x4 lights to come on but did throw a BMW specific code for the transfer case.