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.
"A job worth doing is worth doing at least twice."