Decipher Rear Ford Diff Tag
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Cross-Country
Joined: Jan 2013
Posts: 76
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Decipher Rear Ford Diff Tag
2001 Ford F150 4 x 4 5.4l
Top Line: S 942 A
Bottom Line: 55 9 75 1A02
I assume this is a 9 inch ring gear ? but I dont know
Could not find one online that matched the number pattern
Top Line: S 942 A
Bottom Line: 55 9 75 1A02
I assume this is a 9 inch ring gear ? but I dont know
Could not find one online that matched the number pattern
More Turbo
Joined: Jan 2005
Posts: 510
Likes: 21
From: Clinton TN.
If it is the stock rear end look at the door tag but from the bottom line it appears to be a 3.55 and it is a 9.75 weather it has the 19 or H9 on the door tag is whether it is limited slip or not.
19 – 3.55 Non-LS
18 – 3.08 Non-LS
H9 – 3.55 LS
B6 – 3.73 LS
19 – 3.55 Non-LS
18 – 3.08 Non-LS
H9 – 3.55 LS
B6 – 3.73 LS
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
You have the 3.55, open differential, 9.75" based on what you have provided.
The "3" is probably covered by the bolt head.
If it were an LS axle, the bottom row would read "3L55" as the first characters. It may be possible that the "L" is also under the bolt head so you may need to pull the tag off for a closer look.
The "3" is probably covered by the bolt head.
If it were an LS axle, the bottom row would read "3L55" as the first characters. It may be possible that the "L" is also under the bolt head so you may need to pull the tag off for a closer look.
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Cross-Country
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maybe this will help
String is holding gear in place to be sure it does not fall out. Replacing axle bearings is the reason so I can get the right bearings the first time
Last edited by asterof; Apr 7, 2021 at 11:37 AM. Reason: more info
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