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Post Info TOPIC: posi diff
crazytrain


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I have got a posi diff out of a 68 Bonneville station wagon that I took a motor out of, from the research I did it is a 8.875 12 bolt diff that is suppose to be rare and quite strong, if I am wrong maybe somebody on the forum could correct me, looking to get $300 or maybe trade for some parts for my 67 Beaumont, like maybe a grill or interior parts, can't really get a pic of it in the car but if somebody is interested I will cut it out and post a pic



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65 SD L79


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hey Dan, where are you located in Ontario?



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marshalldude


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posi 12 bolt worth way more than 300 I would say just my opinion



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4SPEED427


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Check the cover, count the bolts, I don't think it will be a 12 bolt in the sense we think of, as in Chevy style 12 bolt. I could be wrong but I don't think Bonneville ever used them.

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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 (now converted to a "factory" 4 speed)
crazytrain


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I'm right near the Manitoba border. the cover is 10 bolt but the guts are 12 bolt. if you research Pontiac diffs you will find some info on them(hard to find). I found info on jdrace.com. if you go to the ten bolt tab then click the fullsize tab if gives you info on the diff and shows they came in 68 bonnevile wagons. I have found info on other sites but like I said it is hard to find, you have to google Pontiac or bop difs



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crazytrain


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correction : if you go to jdrace.com you first have to hit the differential id tab  ,then 10 bolt, then full size, then it shows you all the info on the diff and a picture which looks exactly like the one I have



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seventy2plus2


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They're totally different that a Chevy 12 bolt.  Would be great for someone with a late 60's fullsize US Pontiac (Bonneville, Catalina, Executive and likely Grand Prix)



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70 2+2 convertible
70 2+2 hardtop
70 Parisienne hardtop

 

 
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4SPEED427


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Yes, I believe the 12 bolt Chevy diff is a 30 spline axle which won't be compatible with this one, again, if I am right. I'm subject to correction though!

How far are you into Ontario crazytrain? I do regular trips to our cottage just west of Vermilion Bay.

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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 (now converted to a "factory" 4 speed)
crazytrain


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yeah it is not a chevy diff, it is a pontaic diff which is totally different, I am in Dryden which is abot 30 minutes from vermilion bay



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4SPEED427


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Ok, cool, we have friends on our lake from Dryden. Their son works at the high school, Hodgkinson? You might know him if you have kids in school.

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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 (now converted to a "factory" 4 speed)
cantafforda2door


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Hi Crazy train, do you still have the diff and if so would it fit a 64 parisienne 4 door? Thanks

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crazytrain


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yes I do, not sure what cars it will fit, maybe someone  here would know



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DonSSDD


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It won't fit a 64 as a bolt in.

Don

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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.
1963- Pontiac top selling car in Canada

Mahone Bay, NS Still not old enough to need an automatic
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