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#1 |
Registered User
![]() Join Date: Oct 2013
Location: CT.
Posts: 260
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Diff fit Question
Hello, I have a 94 roadmaster for parts and was woundering if the posi will fit in my 72 c 10
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#2 |
Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,269
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Re: Diff fit Question
kenn, I'm gonna say no. The roadmaster has a 8.5 inch ring gear with 10 bolts attaching it to the carrier. The rear end in your truck is most likely a 12 bolt. Jim
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#3 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,717
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Re: Diff fit Question
Short answer: No.
Longer answer: Your C-10 has a 12 bolt cover truck-specific rear axle while the Roadmaster uses the GM corporate 10 bolt. The 10 bolt was also found in the back of trucks starting around 1980 in 2 wheel drive. They are 28 spline axle shafts until '88 when the new body style trucks received a 30 spline upgrade. The Roadmaster should be a 30 spline as well so would work in one of those.
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#4 |
Registered User
![]() Join Date: Oct 2013
Location: CT.
Posts: 260
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Re: Diff fit Question
Thank you. The frame on my roadmaster broke and I was hopeing that I could swap parts.
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#5 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: Diff fit Question
If the complete rear end is the same width backing plate to backing plate,you could weld on new mounts and possibly use it if you can find a U-joint set to match up,but the 12 bolt is a stronger rear.
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#6 |
Registered User
![]() Join Date: Oct 2013
Location: CT.
Posts: 260
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Re: Diff fit Question
Thanks. I need to put a posi in it and was looking to use what I had if I could.
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#7 |
Registered User
![]() Join Date: Sep 2009
Location: Prescott Valley AZ
Posts: 345
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Re: Diff fit Question
That 10 bolt posi is worth 100 150 on Ebay,then you could use that money to buy one for the 12 bolt
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#8 |
Registered User
![]() Join Date: Oct 2013
Location: CT.
Posts: 260
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Re: Diff fit Question
I will get my daughter to do that, thanks. When I am ready to buy one i'll check back, this site seams to have a lot of info.
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