Hi all,
Ok, so I have a question...before I brought the car down off the jack stands, and accidentally dropped the car on my shoulder, (long story and yes it hurt/hurts like hell) I managed to take a look at the diff and it's a 12 bolt...which I think is a good thing. But, my question is this, does the fact that it's a 12 bolt make it more or less likely to have limited slip?
Have you ordered your GM documents? It shows on there.
If not, then look for a little metal tag under one cover bolt and/or a red plastic tag on the filler plug which is on the driver's side of the centre section, in front of the axle tube.
As far as it being a posi, check on the underside of your trunklid for a rectangular yellow label, or evidence (glue residue) that there was a label like that at one time. I think the jacking instruction label is pretty much square, this label is a rectangle about 2" X 4".
And to finally answer your question, it's totally hit and miss. I've likely owned more big blocks without posi than with. Of course, most of the time the sellers told me it had a posi because it was a big block car, which is totally false.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
well..there was no metal tag attached to any of the cover bolts...will have to look for the red plastic tag. As the car has been repainted, there is no stickers...
If you feel like getting dirty, you can get the code off the axle tube.
Passenger side, front of the tube, close to where the tube goes into the centre section casting. You'll find some numbers and letters there but likely you'll need a steel brush or a wire wheel on some kind of high speed power tool to buff it all off. You don't have to worry about destroying the stamping, it's stamped deep in to the tube. Those numbers give the build date, axle ratio and identify posi/non-posi.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
Have you ordered your GM documents? It shows on there.
If not, then look for a little metal tag under one cover bolt and/or a red plastic tag on the filler plug which is on the driver's side of the centre section, in front of the axle tube.
As far as it being a posi, check on the underside of your trunklid for a rectangular yellow label, or evidence (glue residue) that there was a label like that at one time. I think the jacking instruction label is pretty much square, this label is a rectangle about 2" X 4".
And to finally answer your question, it's totally hit and miss. I've likely owned more big blocks without posi than with. Of course, most of the time the sellers told me it had a posi because it was a big block car, which is totally false.
This is correct about hit and miss. I have 2 big block cars , same year same engine , same trans, but one is posi other is not.
I agree with the logic, that much power should have had a posi as standard equipment. However, I'm sure it was done to keep the cost of a vehicle down.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
As far as it being a posi, check on the underside of your trunklid for a rectangular yellow label, or evidence (glue residue) that there was a label like that at one time. I think the jacking instruction label is pretty much square, this label is a rectangle about 2" X 4".
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Prince Edward Island
'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.
