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Old 07-10-2011, 10:14 AM   #1
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Shudder from steering wheel when moving off - 02 Quigley V10

I sometimes feel a shudder as the van moves from rest. It feels like it is coming from the front as it comes through the steering wheel. It feels like the shudder a LSD makes sometimes, but in this case I'm not turning. After about 6 ft it stops.

I am wondering if maybe there is either some stiction going on inside the front hubs, and that even with them both set to free there is a little resistance to overcome until the van is moving.

I've double checked they are in free, and that the 4WD lever is in 2WD.

The other possibility is this is something related to tire nibble and is normal.

Any ideas? I was going to call Tiger at Quigley and ask him. SMBw didn't think it was a big deal.
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Old 07-10-2011, 08:27 PM   #2
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Re: Shudder from steering wheel when moving off - 02 Quigley

When was your last tire rotation?
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Old 07-10-2011, 10:17 PM   #3
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Re: Shudder from steering wheel when moving off - 02 Quigley

No idea, just got it.
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Old 07-10-2011, 10:35 PM   #4
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Re: Shudder from steering wheel when moving off - 02 Quigley

Are the U-joints on your stub shafts grease-able? At lower speeds the drag in the hubs may still be causing the axle to spin.
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Old 07-11-2011, 12:23 AM   #5
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Re: Shudder from steering wheel when moving off - 02 Quigley

Quote:
Originally Posted by carringb
Are the U-joints on your stub shafts grease-able? At lower speeds the drag in the hubs may still be causing the axle to spin.
They were greased when they did the front end rebuild last month.
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Old 07-11-2011, 12:40 AM   #6
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Re: Shudder from steering wheel when moving off - 02 Quigley

What size tire are you running, it may just be a little tire rub on the fender when shoving off. I get it with my 285/70/16 when starting from a stop and making a turn. No big deal if that is what you are feeling.
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Old 07-11-2011, 07:58 AM   #7
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Re: Shudder from steering wheel when moving off - 02 Quigley

285/75 16, haven't seen any obvious signs of it.
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Old 07-11-2011, 08:50 AM   #8
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Re: Shudder from steering wheel when moving off - 02 Quigley

Might be one (or both) of your front brakes is dragging.


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Old 07-11-2011, 09:23 AM   #9
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Re: Shudder from steering wheel when moving off - 02 Quigley

Sounds like what I had in an old Tahoe I had when the driveline angle was too steep. I converted to CV style and changed my angles accordingly and it was then very smooth. Of course, I think a u-joint in poor condition could yield the same feel even if the angles are fine.

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Old 07-11-2011, 04:56 PM   #10
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Re: Shudder from steering wheel when moving off - 02 Quigley

Spoke with Tiger at Quigley (super helpful!)

He says it is indeed the rear LSD. Because I'm used to driving a big empty lighter V10 cargo van, he said it doesn't exercise the LSD as much. He says it is very common that if you are on the highway a long time, get off the offramp, you'll feel the LSD chatter - which is one case when it happened to me. He said it just feels like the front end because it all goes through the frame, and that the steering wheel only has to be turned just a smidge for it to chatter.

So long story short, a small amount of wheel spin.

(actually my 2WD V10 has an open rear diff now that I think of it, and why I haven't felt it before!!)

In other news, he says the 2002 Quigley uses a Dana 60, which I knew, and "GM '86 K30" style front rotors and calipers, with a slot machined in the rotor to clear the ABS sensor.

He also clarified that while the F series SD went metric (8 x 170) in 99, the E series stayed at 8 x 6.5, so that's why they didn't use the F350 running gear from 97-03 ish, and then they started re-drilling rotors for a while.
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