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Old 05-04-2013, 03:18 PM   #1
classicundercar
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Join Date: Apr 2009
Location: SS, MD
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Vibration Resolved and rear end questions

Hey Guys,

71 K10, sm465/np205; was fighting a driveline vibration when coasting at 55+mph. bit the bullet and took the driveshafts to the shop last week. Both were roached, splines on the slip yokes were shot. 2 new driveshafts and the vibration is gone. R and S spring in Bladensburg, MD did the shafts. Very nice work.

Of course now I notice a large amount (maybe 10 deg or so) of rotational play in the pinion yoke on the rear end. So I'm thinking the gearset is getting a little worn.

What are my options here? What rear is in this truck from the factory? 12 bolt? I don't offroad so I'm really thinking a rebuilt stock rear maybe with some aftermarket axles would be the way to go. Any other options for a relatively easy upgrade where I could keep my 6 lug wheels?

Thanks!
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Old 05-04-2013, 04:21 PM   #2
Rufton
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Location: Knoxville TN
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Re: Vibration Resolved and rear end questions

Some rotational play is required to maintain proper gear lash at temperature.
Was there any up-down or in-out pinion play?
Metal shavings in rear gear oil?
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Old 05-04-2013, 10:31 PM   #3
Mike C
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Location: Austin, TX, USA
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Re: Vibration Resolved and rear end questions

Do you have a lunchbox locker? They are notorious for driveline slack.
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