NP249J Viscous Coupler & Alignment - JeepForum.com
 
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post #1 of 6 Old 12-13-2017, 06:02 PM Thread Starter
Sandy97ZJ
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NP249J Viscous Coupler & Alignment

Could really bad camber and toe cause the viscous coupler to bind up?

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post #2 of 6 Old 12-13-2017, 06:50 PM
wingless
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The common causes for NP249 viscous coupler failure are: long service mileage; excessively high ambient temperature; excessive viscous coupler heat caused by low transfer case fluid level and excessive viscous coupler heat caused by non identical tire outside circumference.


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post #3 of 6 Old 12-14-2017, 12:45 AM
nicyousuckk
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Originally Posted by Sandy97ZJ View Post
Could really bad camber and toe cause the viscous coupler to bind up?
I'm going to go with no, but those alignment issues can cause similar symptoms to those commonly associated with a failing VC.
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post #4 of 6 Old 12-14-2017, 09:44 AM Thread Starter
Sandy97ZJ
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Originally Posted by nicyousuckk View Post
I'm going to go with no, but those alignment issues can cause similar symptoms to those commonly associated with a failing VC.
Thanks!
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post #5 of 6 Old 12-14-2017, 09:48 AM
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Originally Posted by wingless View Post
The common causes for NP249 viscous coupler failure are: long service mileage; excessively high ambient temperature; excessive viscous coupler heat caused by low transfer case fluid level and excessive viscous coupler heat caused by non identical tire outside circumference.
I'm curious, how does long service mileage hurt the VC? Assuming the TC isn't ran low on fluid.

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post #6 of 6 Old 12-14-2017, 09:57 AM
wingless
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The long service mileage failure means that a properly-maintained part (w/ correct transfer case fluid level and w/ identical circumference tires) will eventually wear out and fail.


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