What is the difference between 12 bolt car and truck carrier? - Team Camaro Tech
Transmission & Driveline Transmissions and Differentials

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old Sep 17th, 10, 07:38 AM Thread Starter
Tech Team
 
Join Date: Sep 2005
Posts: 98
What is the difference between 12 bolt car and truck carrier?

?
Jim H is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old Sep 17th, 10, 07:50 AM
Gold Lifetime Member
Joe
 
Join Date: Apr 2010
Location: Rochester Hills, Michigan
Posts: 85
Re: What is the difference between 12 bolt car and truck carrier?

Truck carriers have a smaller pinion shaft diameter.

67 RS Convertible - Twin Turbo 565, 4L80E, DSE 4-Link, 9 inch, XFI with Traction control. Current status: suspension upgrades and paint ongoing
There is no such thing as too much power...The problem is not enough traction!!
67econobox is offline  
post #3 of 7 (permalink) Old Sep 17th, 10, 09:48 AM Thread Starter
Tech Team
 
Join Date: Sep 2005
Posts: 98
Re: What is the difference between 12 bolt car and truck carrier?

How does the pinion shaft diameter effect the carrier or spool? Is the mounting flange for the crown gear on a different offset? Can you only tell them apart by the pinion shaft diameter?
Jim H is offline  
post #4 of 7 (permalink) Old Sep 17th, 10, 09:53 AM
Senior Tech
Freddie
 
Join Date: Feb 2000
Location: Central City, Ky.
Posts: 5,531
Re: What is the difference between 12 bolt car and truck carrier?

The ring gear flange offset is different. Everything else is pretty much the same. If you try to use a truck differential in a car rear end you have to do some shimming and sometimes some grinding to make it fit. Same thing if you go the other way.
big gear head is offline  
post #5 of 7 (permalink) Old Sep 17th, 10, 10:06 AM Thread Starter
Tech Team
 
Join Date: Sep 2005
Posts: 98
Re: What is the difference between 12 bolt car and truck carrier?

A friend has a Vega drag car with a 12 bolt. We assumed it had a spool, but turns out, only has a posi. We are not sure which spool to buy. Because we have no history on this diff. Not sure if it is a cut down truck or car diff. How else can we tell?
Jim H is offline  
post #6 of 7 (permalink) Old Sep 17th, 10, 11:35 AM
Senior Tech
Freddie
 
Join Date: Feb 2000
Location: Central City, Ky.
Posts: 5,531
Re: What is the difference between 12 bolt car and truck carrier?

The 12 bolt truck rear end has a cover that is sort of shaped like a diamond on it's side. The car 12 bolt has a cover that is mosly round. If it has the Eaton Posi then there will be a casting number on the right side next to the bearing. Let me know what this number is and I can tell you if it's a truck or car.

This is the car 12 bolt.

Last edited by big gear head; Sep 17th, 10 at 11:46 AM.
big gear head is offline  
post #7 of 7 (permalink) Old Sep 17th, 10, 11:53 AM Thread Starter
Tech Team
 
Join Date: Sep 2005
Posts: 98
Re: What is the difference between 12 bolt car and truck carrier?

It's the round car diff!! THANK YOU
Jim H is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome