NV271 transfer case issue - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 5 (permalink) Old 02-18-2015, 02:27 AM Thread Starter
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NV271 transfer case issue

Hey guys, I've been chasing down a driveline vibration for quite some time now and I think it finally showed itself. The output shaft seal on the transfer case is leaking and there is some lateral play in the shaft. After looking at parts explosion it looks like there is a needle bearing in the extension housing. Just curious how many of you guys have changed this bearing out for play in output shaft and seal leakage? Thanks
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post #2 of 5 (permalink) Old 02-19-2015, 01:50 AM Thread Starter
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Re: NV271 transfer case issue

no one else has seen this problem i suppose.

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post #3 of 5 (permalink) Old 02-19-2015, 03:14 AM
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Re: NV271 transfer case issue

229,500 and counting. I haven't had that problem yet. how is the oil level in the case?

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post #4 of 5 (permalink) Old 02-19-2015, 03:22 PM Thread Starter
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Re: NV271 transfer case issue

It is fine. I changed it about 15k miles ago with synthetic ATF. This truck has had a strange driveline vibration for a long time that i could not figure out at 70+, felt worst at 75. NOTHING is felt at all before this speed. I road forced all the tires, replaced all U joints and had driveshaft balanced on competition balancer. Running truck on lift it can be felt in center bearing and back of T/case. Its transmitting to truck via the carrier bearing. There is zero play in this bearing and rubber. I have never noticed play in the output shaft of the T/case before recently. Maybe finally showed itself?

I'm going to pull the extension housing off the T case and change the bearing and seal. I'll post back after i fix it. I just hope the ball bearing in the case is still good i dont feel like overhauling it right now.

Oh, and current mileage is 181,000
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post #5 of 5 (permalink) Old 02-19-2015, 06:21 PM Thread Starter
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Re: NV271 transfer case issue

Im just curious, but is it possible for the carrier bearing rubber to be TOO tight not dampening any vibration? I cannot move the shaft at all. This would be a first for a failure like this that i have seen.
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