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Old 01-15-2009, 07:58 AM   #1
1969K10
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Front ds vibration

Looking for ideas,
2WD, hubs unlocked - no vibration
4WD, hubs locked - no vibration
2WD, hubs locked - vibration. and it phases in and out. I'm fairly certain it's coming from the front.

anyone got any ideas? THX
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Old 01-15-2009, 03:01 PM   #2
vtblazer
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Re: Front ds vibration

Slip joint would be where I'd look first, then front u-joints, then...everything else.
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Old 01-17-2009, 07:09 PM   #3
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Re: Front ds vibration

i had a similar problem then i grenaded the right front axle and repleced it with another one and presto! no more vibration. not sure the reason behine the grenading axle but it could've been a bad u-joint since the new axle has a new u-joint in it
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Old 01-19-2009, 07:37 AM   #4
1969K10
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Re: Front ds vibration

thanks for the replies! I've noticed no vibration at slower speeds, then around 50 it starts to pick up... I'm starting to wonder if the DS is out of balance. I picked it up from a junkyard when I did my T-221 to NP205 conversion...
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1969 K10 - V8, 465, 205, 12 bolt, D44 2002-current
1969 K20 - V8, 465, 221, Eaton, D44 2012-current
Nothin' but drums on all 4 corners!

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72 C10-short step (97-02), 68 C10-long fleet (06-12)
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Old 01-19-2009, 08:58 AM   #5
special-K
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Re: Front ds vibration

In that mode your wheel are turning you shafts freely,as in unengaged to the t-case.Wteh it in 4wd it`s enough to put tension on the worn joint.So,it would be either in the axle "u"s or driveshaft.Put t-case in neutral and unlock hubs to check for play in joints.You`ll be able to turn everything into whatever position.Once in position you can hold one side of the joint or lock the hubs.Stick a big screwdriver through the joint and check for slop.You should notice slop by losking hubs,grabbing the d-shaft and twisting back and forth,too.
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