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axle codes - help me decode these

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Old Aug 8, 2007 | 07:25 PM
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axle codes - help me decode these

hello, newbie here,

my 76 F-100 has an axle code of: 12J

my 68 F-100 has an axle code of: 08


What are the ratios of these rearends?
 
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Old Aug 8, 2007 | 09:31 PM
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12 = 3.00:1

J= Power steering


08 = 3.50 :1
 
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Old Aug 8, 2007 | 09:47 PM
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From: north mississippi
are you sure the 1968 model 08 code isn't limited slip? my grandfather bought that truck new and said he ordered posi-traction with it.
 
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Old Aug 8, 2007 | 10:03 PM
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LS /Traction Lock rear axles had a letter in front of the number

ie: A2 , B4, C6.....later on an H2,H4,H6

Posi-traction is a GM term,. Maybe he ordered posi on his chevy truck ?
 

Last edited by Mil1ion; Aug 8, 2007 at 10:07 PM.
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Old Aug 9, 2007 | 09:14 AM
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From: north mississippi
thanks for the info. i haven't even looked at the tag on the chunk, would it have the same numbering system as the door tag?


is there a forum on this site where you can go and put in your codes and find out what engine/trans/color/interior/axle ratio is on a truck? Our Fairlane site has a place where you can do that.
 
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Old Aug 9, 2007 | 09:15 AM
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From: north mississippi
Originally Posted by Mil1ion
LS /Traction Lock rear axles had a letter in front of the number

ie: A2 , B4, C6.....later on an H2,H4,H6

Posi-traction is a GM term,. Maybe he ordered posi on his chevy truck ?
is it possible that the "0" isn't a zero and is actually an "O" (oh)
 
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Old Aug 9, 2007 | 12:44 PM
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Nope.
Ford never used O in codes except for Date of build

They never used I (i) either.

The look like there number counterpart.

08 is good number .




Rating plate codes ?

Just post them me or someone else will decode them for you.


You can use My page here (77-79) to decode some of them but trim/paint codes changed descriptions in some years.

http://www.clubfte.com/users/mil1ion...ruckCodes.html
 
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Old Aug 9, 2007 | 01:00 PM
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hmmm, talked to my father and he is absolutely convinced that the 68 model 08 code came with a locking rear. He said he went with my grandfather to buy it, and it was something he paid extra for. I asked him if the driver's door had ever been changed and he said no. I wonder if the backend may have been installed or changed at the dealership?
 
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Old Aug 9, 2007 | 01:03 PM
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Type in your vehcile info into this and see what comes up.

http://www.medicine.wisc.edu/~mrm/bronco/ftvin.cgi
 
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Old Aug 12, 2007 | 07:47 PM
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From: north mississippi
here's a couple more:


72 model - C 08

78 model - G 4J
 
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Old Aug 13, 2007 | 09:55 AM
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From: north mississippi
Originally Posted by SD44
here's a couple more:


72 model - C 08

78 model - G 4J
bump to front page............
 
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Old Aug 13, 2007 | 11:03 AM
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Those letters ( C & G) are too far away from the numbers to be part of the axle code.

They look like Transmission codes
 
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Old Aug 13, 2007 | 11:15 AM
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From: north mississippi
Originally Posted by Mil1ion
Those letters ( C & G) are too far away from the numbers to be part of the axle code.

They look like Transmission codes
If it's locking, would the letter be right up against the number, like this? C8
 
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Old Aug 13, 2007 | 11:15 AM
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Yes it would
 
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Old Aug 13, 2007 | 05:05 PM
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By the way...none of these trucks ever came with factory "lockers" only limited slips which by now probably would be in need of new clutches. Maybe try to jack up the rear end and see if both tires spin the same way or in opposite directions.
 
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