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#1 |
Registered User
![]() Join Date: Nov 2013
Location: marshall, il
Posts: 282
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Rear End Question
What is the difference in a 12 bolt pick up rear end and a car rear end? I'm wanting to take the open carrier out of my 67 swb and put in a posi unit but seems to me all I can find is car carriers and they say they won't fit. Thanks in advance guys!!!
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#2 |
Registered User
Join Date: Jan 2012
Location: Glencoe Alabama
Posts: 510
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Re: Rear End Question
If I'm not mistaken, the pinion is smaller in a car rear end.
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72 Cheyenne super 10 08 3500 HD 4dr dually 12 ford flex (wifes ride) 76 Monte Carlo 83 Chevy short wide Silverado 96 Mazda Miata, 2000 Allegro Bus |
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#3 | |
Account Suspended
Join Date: Jan 2007
Location: Tucson
Posts: 2,183
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Re: Rear End Question
Quote:
Drive train specialists has the unit you are looking for. |
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#4 |
Registered User
![]() Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
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Re: Rear End Question
Truck rear has the smaller pinion. Trucks and cars have different ratio breaks for the 3 and 4 series. You will need a truck carrier.
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Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299 |
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#5 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Rear End Question
If you look though my posts I listed the bearing combinations needed to make one work with the other (car posi carrier in truck rear end). I've never done it, but I found the information and shared it.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#6 |
Registered User
Join Date: Oct 2011
Location: Bloomington Indiana
Posts: 322
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Re: Rear End Question
Is the carrier different for a 3:73 and a 3:08? I am wanting to switch, and was told I would need to get a different one. I have a 67 with a 12 bolt. Thanks
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#7 |
Registered User
![]() Join Date: Nov 2013
Location: marshall, il
Posts: 282
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Re: Rear End Question
I'm pretty sure the carriers are the same no matter what gearing you have. I think there's just a difference in the housing between car and truck housings.
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#8 |
Registered User
Join Date: Oct 2011
Location: Bloomington Indiana
Posts: 322
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Re: Rear End Question
Thank you for the info. Hope this question was along the same lines as the original one.
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#9 | |
Registered User
Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: Rear End Question
Quote:
OP, if you want to go posi a TrueTrac will get you there and replaces the carrier entirely.
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1968 LWB C20 / AC / Wood Bed |
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#10 |
Registered User
![]() Join Date: Nov 2013
Location: marshall, il
Posts: 282
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Re: Rear End Question
Ok that's exactly what I was looking for. Now for my next question I looked at summit for the true trac which one am I going to need? Is it the 8 5/8, 6"?
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#11 |
Registered User
Join Date: Jul 2013
Location: Southern Wisconsin
Posts: 126
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Re: Rear End Question
A truck carrier is longer ( wider) than a car carrier
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