Which Powertrax Products?

Old Jun 7, 2017 | 10:22 AM
  #1  
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Which Powertrax Products?

I have a '67 C/S with a 12 bolt Type 'O' rear end. Which Powertrax products will fit my differential? There is a LOT of confusing information out there. A call to Powertrax only made it worse.
Old Jun 7, 2017 | 10:35 AM
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a 28 spline Corporate GM 8.5 10 bolt 71-up
Old Jun 7, 2017 | 11:48 AM
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Contact Monzaz on Classic Olds for parts that you need.
https://classicoldsmobile.com/forums...rs/monzaz.html
Old Jun 7, 2017 | 02:29 PM
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the answer is NONE. X2 on Monzaz, here is his website http://www.jdrace.com, give him a call he has helped many Olds guys.
Old Jun 7, 2017 | 03:18 PM
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Well, according to his website, he refers to a Powertrax option for the Type 'O' rear. This is why it is so confusing. HAS ANYONE ACTUALLY INSTALLED A POWERTRAX IN A TYPE O?
Old Jun 7, 2017 | 04:07 PM
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There are not that many options for your type O, like I said contact monzaz. His business is rear ends.
Old Jun 7, 2017 | 06:01 PM
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Originally Posted by GEARMAN69
a 28 spline Corporate GM 8.5 10 bolt 71-up
This is what I recall reading in some posts when this was discussed a while back.


https://classicoldsmobile.com/forums...der-gears.html
Originally Posted by 507OLDS
Lock-Rite # 1920LR for the O-axle open carriers,28-spline.This is the same unit for the 8.5" 10-bolt open carriers.
It was also discussed in this thread:
https://classicoldsmobile.com/forums...-rear-end.html
Old Jun 8, 2017 | 07:45 AM
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Originally Posted by 70cutty
the answer is NONE. X2 on Monzaz, here is his website http://www.jdrace.com, give him a call he has helped many Olds guys.
Yes get wth JD but... a Powertrac just fits in the open diff and the 8.5 corp guts are exact fit... I have a mini spool in my type O right now
Old Jun 8, 2017 | 09:38 AM
  #9  
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I have an open-type differential with 3.08 gears. Thanks for the help.
Old Jun 8, 2017 | 09:48 AM
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Post your findings as there are others, including myself in the same situation as you looking to upgrade our type O's.
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