[urq] Diff Lock Question

[Stephen Kraus]

The gearing of the differential allows for the power split to normally be
50/50 until a variable changes, at which point the power split will change
to make up for slippage



On Tue, Jul 1, 2014 at 12:55 PM, John Koenig <koenigj at comcast.net> wrote:

> I'm a little confused. Since an open diff will allow one wheel to spin
> freely while the other doesn't, how does that translate to a constant 50/50
> torque split?
>
> ----- Original Message -----
>
> From: "Mike Sylvester" <mike at urq20v.com>
> To: "David Schaible" <David.Schaible at jrspharma.com>, "Paul Ahvenainen" <
> pahven at gmail.com>, urq at audifans.com
> Sent: Tuesday, July 1, 2014 11:25:48 AM
> Subject: Re: [urq] Diff Lock Question
>
> David,
>
> I would not recommend doing that.
>
> An open diff can have unequal rotation but has a 50/50 torque split all
> the time.
> A locked diff has locked rotation and can have a 100/0 torque split
> which means one wheel will loose traction and be forced to do so in
> tight corners.
>
> How did you turn around in a parking lot? I'm surprised you didn't
> break something driving 10k miles that way.
>
> Mike
>
> > -------- Original Message --------
> > Subject: Re: [urq] Diff Lock Question
> > From: "Schaible, David" <David.Schaible at jrspharma.com>
> > Date: Tue, July 01, 2014 9:30 am
> > To: 'Paul Ahvenainen' <pahven at gmail.com>, "urq at audifans.com"
> > <urq at audifans.com>
> >
> >
> > Probably good advice thinking about $ and parts availability to repair,
> however I don't know that I've heard of anyone in 15 years who has had any
> issues with center or rear diffs. I broke the actuator arm on my 200q20v
> rear diff in the lock position and drove it locked almost 10k miles before
> I replaced the diff. You can feel it and it will scrub your tires down
> faster but as far as it being dangerous.....I don't agree. Many people say
> the old setup, mechanical diff in center and rear is more predictable than
> the torsion.
> >
> > David Schaible
> >
> > JRS PHARMA LP | 2981 Route 22, Suite 1 | Patterson, NY 12563
> > (P) 845.878.8343 | www.highfunctionalityexcipients.com |
> www.jrspharma.com
> >
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> > -----Original Message-----
> > From: urq [mailto:urq-bounces at audifans.com] On Behalf Of Paul Ahvenainen
> > Sent: Monday, June 30, 2014 10:17 PM
> > To: urq at audifans.com
> > Subject: [urq] Diff Lock Question
> >
> > I had 2Bennett do some work on my 83 urq last week. It's very nice to
> work with a team that understands these cars and actually keeps parts on
> hand.
> >
> > Any way, when I picked up the car, they gave me some advice about the
> differential locking mechanism. Basically, they said don't use it for
> anything other than getting out of a ditch. They said it should only be
> used at low speed, in a straight line, otherwise the handling will be
> dangerous and the repairs will be expensive. According to the owners manual
> the system is recommended for use for low traction conditions, like rain.
> >
> > I'm curious about experiences that other early urq owners have had. My
> car has the single stage activation that locks both the center and rear
> diff at the same time.
> >
> > Thanks. Paul
> >
> > Sent from my iPad
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