Loaded

How may actually came with them? Common or uncommon?

theiceman

I have it in my 78..

ebsalem

LSD in a 911???

d00d they made a lot of these cars in the Seventies....

theiceman

ebsalem
I don't understand your comment ... LSD has been around that long.. both kinds :-)

Lsd was around in the 50s ...

JV911

i have one from an SC in my '76

WPOZZZ

Got one in my 85 RoW Cab along with the tranny cooler.

911 in SC

Same here on my '84 RoW.

spence88mph

is it in the option codes, if so, sadly mine doesn't.

10 GT3

It is a normal option. but I would guess that only about 20% of the cars have them. Fortunately, retrofitting an LSD in a 915 or G50 gearbox isn't that difficult of a task.

JackOlsen

Many of the factory ones are worn out by this point. The clutch plates have a finite life.

Mike Murphy

My car does not have one...

der Mond

Jack,
I have LSD spec'd for my car and when I tried Redline NS 75W-90 it chattered, so I put some LSD additive in it and it's fine. However, I noticed this summer when it was in the air that when I rotate a rear wheel forward the opposite one rolls backwards. I thought if the car had LSD they'd both roll forward. So I'm wondering if that indicates worn out clutch plates and inoperative LSD?

theiceman

Der Mond

I have LSD and when i rotate one wheel forward , the other indeed goes forward also so you are correct in the theory anyway .. .

Peter Zimmermann

The LSD option is very rare. My shop averaged between three and five 911 service/repairs a day and we could go months without seeing one with LSD. SOP was to turn a rear wheel before re-filling the trans so we would know to add the LSD additive. Properly cared for the system is extremely reliable, we repaired very few of them.
Pete

Loaded

Thanks Peter. I wonder why they are rare? I can say that in rain its not very fun on the street.