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Canadian Poncho Homepage -> Canadian Poncho -> 1970 + Canadian Pontiac Power Train Forum -> 1970 LeMans rear end
Post Info TOPIC: 1970 LeMans rear end
58StratoCheif


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1970 LeMans rear end
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I have a 70 lemans parts car with a 10 bolt rear that has the cut outs on the sides of the cover and it also has the square ears just like a 8.5 rear end has. Can someone tell me exactly what this rear end is. I would like to build a 8.5 10 bolt for my 72 lemans to replace my 8.2 peg leg.

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4SPEED427


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It sure sounds like the stock diff to me. Picture of it may help?

It is not likely the same as the 72 Lemans diff.

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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)
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the70judge


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Does it look like this but in better shape?   Then it will be a BOP 8.2 10 Bolt diff... 



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the70judge


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the70judge wrote:

Does it look like this but in better shape?   Then it will be a BOP 8.2 10 Bolt diff... 



 Oh.. forgot its out of my 70 Judge...  Sort of had a mishap last month..  :>(



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Pete
455gto


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No teeth like a Surrey hooker biggrinbiggrin

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pontorquer


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Hey 70JUDGE, these 8.2 cone type limited slip aren't meant to be beaten on, they are not very strong unit, you'd better find a 12 bolt with the real clutch posi off a 455 1970-72 GTO car or Chevelle, Beaumont some Olds Cutlass ... 4 links.

Here is a pic of the 10 bolt limited slip rear end off my 1970 Bonneville, same cone type as GTO but bigger.

-- Edited by pontorquer on Monday 23rd of November 2009 09:49:37 PM

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Beaumont4008


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Its possible that it is a 8.5. I think 70 was the change over year for some models. does it have the ears on the bottom like the pic below ? If it does thats one hint its a 8.5. If you take the cover off and put a wrench on the bolts holding the ring gear they should be a 11/16 head. The 8.2 had a 9/16 head. Also the the 8.5 ring gear bolts are L.H. thread the 8.2 are R.H.  



chevy85-10bolt.jpg

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4SPEED427


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58StratoCheif wrote:

I have a 70 lemans parts car with a 10 bolt rear that has the cut outs on the sides of the cover and it also has the square ears just like a 8.5 rear end has. Can someone tell me exactly what this rear end is. I would like to build a 8.5 10 bolt for my 72 lemans to replace my 8.2 peg leg.


If it has cut outs on the cover it can't be an 8.5 can it?

 



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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)
Beaumont4008


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Carl Stevenson wrote:

58StratoCheif wrote:

I have a 70 lemans parts car with a 10 bolt rear that has the cut outs on the sides of the cover and it also has the square ears just like a 8.5 rear end has. Can someone tell me exactly what this rear end is. I would like to build a 8.5 10 bolt for my 72 lemans to replace my 8.2 peg leg.


If it has cut outs on the cover it can't be an 8.5 can it?

 


The BOP 8.5's had the cut outs the chevy's were round.

 



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4SPEED427


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So there's 2 totally different styles of 8.5?

I had always thought the cut out covers were a smaller ring gear.

Learned again today!

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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)
455gto


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It is a 8.5. He asked me to see about parts for it.
Take a look at his L.H. bolts.....metal does stretch confuseconfuseconfuse

20091103_0492.jpg

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