brutus

If you are on a crowned road as most are and on snow or ice trying to get moving the posi will spin both wheels and the rear will slide sideways toward the gutter. Wide tires make it worse as the fronts wedge against the snow and resist forward movement. In some ways the limited slip helps people get going faster than they probably should given the conditions. The Challenger being quite nose heavy and originally fitted with narrow tires and marketed as a pony car needed all the help it can get

17prospective buyer

You know, all my buddies use this to describe any LSD. They seem to think it's the standard term for an LSD equipped rear end. I always laughed when they asked whether the rear end in my 928 was "posi". I didn't understand them at first.

brutus

Bill Ball's infamous smoking burn out was a single tire burn out no limited slip so no fishtailing drama.

GregBBRD

"Roughly". A percentage in two digits. "Roughly"

Rob Edwards

Well, it was 2307 out of 5404. 42.69% is close enough.

tilac999

It should have been standard, not an option.

brutus

The dentists wives did not know what a limited slip was or why they should spend another $800 on that Porsche that HE WANTED but they insisted MUST be an automatic. I wonder what % of 911s had a limited slip ? Early years it was quite low.

Speedtoys

Cheaper than it is today.

Mike Simard

I don't know what the percentage of LSDs are in 911s but I've been looking for one for a long time and have never seen one. There are bunches of the old 915 boxes out there but none of them seem to have LS.

tilac999

I think with the air-cooled 911, so much weight over the rear made it an option for the track only.

PorKen

Now that I have both an auto and 5-speed LSD equipped 928, I find that when driving either, I spend considerably less time trying to convince myself that I do not need M220.

danglerb

In an nutshell if you have one tire spinning frequently enough to notice or bother you, LSD might help.

nsantolick

Thanks all for your input. I'm definitely going to have LSD added. I'm pretty curious how that fishtail effect will be, but not really worried at all.

I'm surprised that people who spent this much on a 928 balked at adding it, but the comment about the Dentist's wife kind of explains things. lol The fact that the post 1990 cars all had something similar is interesting.

I HAVE heard a lot of comments on fishtailing, here, and elsewhere. I just never have felt it, so I was curious. Transferring more power though is nice. I drive my car year round, so it won't hurt with the snow either, I suppose.

It'll be nice to have my car back, finally. Glad it'll have the LSD. It's definitely a "keeper" for me...

ShawnSmith

My car started with no LSD. At stock hp, I'd have to say on dry roads you may not really need it much for street driving.

Then I (ahem) had a certain expert install a few more ponies under the hood. LSD and bigger rear tires became not just a would-be-nice, but absolutely essential. At one point we were literally spinning one rear tire on the dyno for lack of ability to strap it down hard enough to hold the motor output.

The trade off is real - I've spun the thing touching the throttle leaving an unexpectedly wet corner. I suspect with an open diff that cornering would have been tamer... and a lot slower.

jon928se

I used to think that also until I found myself on a local road with 180 degree hairpin bends ( inside edge of the road after the bend is nearly vertically above the inside edge before the bend. Coming round one of these bends in the lane on the inside of the bend I had to stop to avoid a car coming down . This resulted in front inside wheel and rear outside wheel on the ground. A gentle start resultd in inside rear rotating off the ground. A bit/lot more gas locked up the 140,000 mile old 40% diff and got me up with just one wheel drive.