Ford 9" Rear End Question
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Junior Member
Joined: Nov 2010
Posts: 4
Ford 9" Rear End Question
I just bought a 1973 Gran Torino. These are the tag numbers off the rear end.
WEB-AD5 3CA
2 75 844A
All I can tell from this info is what the gear ratio is, it is a 9" and is not a posi lock. Can anyone help with more decoding?
Also, can this be changed to posi lock without changing out the whole rear end?
WEB-AD5 3CA
2 75 844A
All I can tell from this info is what the gear ratio is, it is a 9" and is not a posi lock. Can anyone help with more decoding?
Also, can this be changed to posi lock without changing out the whole rear end?
Senior Member
Joined: Jan 2007
Posts: 2,209
From: Yorkshire, NY
I would say that you have a 2.75:1 gear ratio. You may even already have a Trac-Lock rear end as the 2.75:1 was availalble as a Trac-Lock. Check the axle code on the data plate. Axle code "2" is an open diff and a "K" is a Trac-Lock diff.
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