Axle codes
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Elder User
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From: Indiana
Axle codes
Hi,
I have a 1977 F100 with the axle code (metal tag on drivers door)of 12 and a 1978 F100 with a code of 13J. Can anyone tell what this stands for. They both are the 9" rearend. I have a Chilton manual and it shows those numbers but it is not listed under the years I have. I'd like to know if the ratio and if by chance if it is a limited slip.
Thanks
I have a 1977 F100 with the axle code (metal tag on drivers door)of 12 and a 1978 F100 with a code of 13J. Can anyone tell what this stands for. They both are the 9" rearend. I have a Chilton manual and it shows those numbers but it is not listed under the years I have. I'd like to know if the ratio and if by chance if it is a limited slip.
Thanks
Thread Starter
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Elder User
Joined: Feb 2004
Posts: 830
Likes: 0
From: Indiana
I just did a search and found a link. The 12 is a 3:00 ratio and the 13J is a 2.75 ratio and the J stands for power steering. Does anyone know if I can tell if it would be limited slip or not? Would it have to be taken apart or did they even offer that in a 2wd truck? Any thoughts are appreciated.
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shamp
1973 - 1979 F-100 & Larger F-Series Trucks
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May 1, 2010 04:03 PM
