How to identify rearend?

[WVstxFord]

How do I indentify the rear end in my truck? its a 4x4 stx f150 that i was told it had a 273 rear end.. yes thats right.. 273.. But how do I know for sure? does anyone know where I can look to find it for sure? this is a 2005 f150.

[polpilot]

Look on the door sticker on the drivers side, or there should be a tag on the read diff it's self.

[WVstxFord]

nothing identifying it in the door jam.. just went and looked.

[FX41]

did you look at the diff itself? there should be a tag bolted on it to the left\

[glc]

There is an axle code on the door sticker - its 2 characters under "axle". Mine says "H9" which is 3.55 limited slip. It's the same sticker that has the build date, tire pressures, GVWR, etc. Look at the bottom row.

[luckytii7]

call parts dept at the dealer with the vin. thats what i did

[WVstxFord]

Mine says b6 anyone know what that is?

[kingfish51]

Yes, it is a 3.73 limited slip.

[bluejay432000]

As Kingfish stated, a LS 3.73. Here is the list.

19 — 3.55 non-limited slip (Econoline, F-150)
18 — 3.08 non-limited slip (F-150)
17 — 3.31 non-limited slip (Econoline)
H9 — 3.55 limited slip (F-150, F-250)
B6 — 3.73 limited slip (F-150, F-250)
24 — 3.73 (Econoline)
32 — 4.10 (Econoline)
35 — 4.09 (Econoline)
34 — 3.73 (Econoline)
39 — 3.55 (Econoline)
52 — 4.10 (Econoline)
56 — 4.10 (Econoline)
81 — 4.63 (Econoline)
27 — 3.31 non-limited slip (F-250)
26 — 3.73 non-limited slip (F-250)
41 — 3.27 non-limited slip (Explorer/Mountaineer)
45 — 3.55 non-limited slip (Explorer/Mountaineer)
46 — 3.73 non-limited slip (Explorer/Mountaineer)
42 — 4.10 non-limited slip (Explorer/Mountaineer)
D1 — 3.27 limited slip (Explorer/Mountaineer)
D4 — 3.73 limited slip (Explorer/Mountaineer)
D2 — 4.10 limited slip (Explorer/Mountaineer)
84 — 3.45 non-limited slip (Ranger)
86 — 3.73 non-limited slip (Ranger)
87 — 4.10 non-limited slip (Ranger)
89 — 4.56 non-limited slip (Ranger)
F6 — 3.73 limited slip (Ranger)
F7 — 4.10 limited slip (Ranger)
92 — 3.08 non-limited slip (Ranger)
R5 — 3.55 limited slip (Ranger)
91 — 3.27 non-limited slip (Ranger)
96 — 3.73 non-limited slip (Ranger)
R6 — 3.73 limited slip (Ranger)"
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[WVstxFord]

thanks bluejay, your awesome