What is this thing on my TC output side??? - Jeep Wrangler Forum

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Old 01-02-2013, 01:42 PM
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Arrow What is this thing on my TC output side???

Hi, everyone,

There is a big thick metal disc on the rear output side of my transfer case. What is it? I've looked around trying to figure it out, but I don't see any other NP-231's with that thing. Any idea what it is, what it's for, and what I do with it?

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Old 01-02-2013, 01:45 PM   #2
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Harmonic balancer. It is common to have this on your np231

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Old 01-02-2013, 01:47 PM   #3
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Old 01-02-2013, 01:56 PM
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Thank you for the explanation! Got more threads to read up about it, now that I know what it is. Love this forum!
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Old 01-02-2013, 05:35 PM   #5
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It was to dampen a low frequency vibration coming from the T-case.
This damper is also used on some XJ's.
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