There’s no question, the easiest way to identify the axle and gear ratio in your truck is from the door sticker. If you open the drivers door and look at the door jamb, you’ll see a sticker like the one shown below:

You’ll see that the area labeled (F) is for the Axle Code.

Here are some examples of actually stickers:

Once you know the door code, go to the chart below to identify it. If for some reason you find a code missing from the chart and would like to add it, please use the Contact Page.

You’ll notice that there are some codes with different gear ratio’s listed. Unfortunately, the same codes were reused in different years. If you have any more information to help narrow these codes down, please use the Contact Page.

 

Axle Code
(Door Sticker)

 Axle Capacity Gear Ratio

Year / Vehicle
01 Ford 9″ 2800 2.75
02 Ford 9″ 2800 3.00
04 Ford 9″ 2800 3.25
07 Ford 9″ 2800 2.47
12 Ford 3800 2.73 1991
13 Ford 9″ 3750 2.75 1981-1983
13 Ford 8.8 4.11 1985-1986
14 Ford 9″ 3750 3.00 1981-1986
15 Ford 9″ 3750 3.25 1981-1982
15 Non Limited Slip 3.31
15 Ford 9″ 3750 2.73 1983
15 Ford 9″ 3750 3.15
16 Ford 9″ 3750 3.50
16 Ford 3.73
17 Ford 3300 3.25 1971
17 Ford 3800 3.31 1995 / 1999-2002 / Expedition
17 Ford 3.55 1998
17 Ford 3.73 1997
17 Ford 9″ 3750 2.47
18 Ford 8.8 3800 3.08 1983-1986
19 Ford 8.8 3800 3.55
22 Dana 5300 4.10
23 Dana 60 5300 3.54
24 Dana 60 5300 3.73 Econoline
25 Ford 5300 4.10 1991
25 Dana 60 5300 3.33
26 Ford 4050 3.55
26 3.73 F-250
27 3.31 F-250
27 Ford 5300 3.73
27 Dana 70 7400 4.10
28 Dana 70 7400 4.56
29 Ford 10.25″ 5300 3.55 1991
31 Dana 6250 3.07
31 3.73 F-250 / Excursion
32 Dana 6250 4.10 Econoline
32 Dana 61 5300 3.00
33 Dana 61 6250 3.54
33 Ford 4.30 F-250
34 3.73 Econoline
35 4.09 Econoline
35 Ford 6250 4.10 1991
36 Dana 70 7400 3.73 1980
36 4.56 F-250
37 Dana 60 5300 3.54
37 Non Limited Slip 3.73 Super Duty
3L Limited slip 3.73 Super Duty
38 Ford 6250 3.08
38 Dana 60 5300 3.73
39 Ford 10.25 6250 3.55 1991 Econoline
41 Dana 6250 3.54
41 3.73 F-350
41 Non Limited Slip 4.10 Super Duty
42 Dana 6250 3.73
42 Dana 7400 4.10
43 Dana 7400 3.54
43 Dana 6250 4.10
43 4.30 F-350
4L Limited Slip 4.30 Super Duty
4N Limited Slip 4.10 Super Duty
4W Limited Slip 4.10 Ambulance Package
44 Dana 6250 4.56
45 Ford 7400 4.10 1991
46 4.56 F-350
48 Non Limited Slip 4.88 Super Duty
49 Ford 10.25 7400 3.55 1991
51 Dana 70 HD 7400 3.73
52 Dana 70 HD 7400 4.10 Econoline
53 Dana 70 HD 7400 4.56 1982
53 Dana 70 HD 7400 3.54 1983-1986
53 Non Limited Slip 5.38 Super Duty
5L Limited Slip 5.38 Super Duty
56 4.10 Econoline
61 3.73 F-350
62 Dana 8100 4.10
63 Dana 8200 3.54
63 4.30 F-350
65 Ford 8250 4.10 1991
66 4.56 F-350
69 Ford 10.25 8250 3.25
69 Ford 8250 3.55 1991
72 Dana 6300 4.10
72 Dana 11000 4.63
73 Dana 6300 3.54
73 Dana 11000 5.13
73 4.30 F-450
75 5.38 F-450
78 4.88 F-450
81 3.73
81 4.63 Econoline
82 4.10 F-350
83 4.30 F-350
86 4.56 F-350
88 4.88 F-350
8L Limited Slip 4.88 Super Duty
95 5.38 F-550
98 4.88 F-550
B2 Dana 5300 4.10
B3 Dana 5300 3.54
B4 Dana 5300 3.73
B5 Dana 60 – Limited Slip 5300 3.33
B5 Ford 10.25 – Limited Slip 4.10
B6 Ford – Limited Slip 5300 3.55
B6 Ford – Limited Slip 3.73
B7 Ford – Limited Slip 5300 3.73
B9 Ford 10.25 – Limited Slip 3.55
C1 Ford – Limited Slip 3.73 F-250 / Excursion
C2 Dana 61 – Limited Slip 5300 3.00
C2 Dana 61 – Limited Slip 5300 3.54
C2 Dana – Limited Slip 6250 4.10 F-250 / Excursion
C3 Dana Limited Slip 6250 3.54
C3 Ford – Limited Slip 4.30 F-250 / Excursion
C5 Ford 10.25 – Limited Slip 4.10
C6 Ford – Limited Slip 4.56 F-250
C7 Dana 60 – Limited Slip 5300 3.54
C9 Ford 10.25 – Limited Slip 3.55
D1 Limited Slip 3.73 F-350
D2 Limited Slip 7400 4.10
D3 Ford Limited Slip 3.54
D3 Dana – Limited Slip 6250 4.10
D3 4.30 F-350
D5 Ford 10.25 – Limited Slip 7400 4.10
D6 Limited Slip 4.56 F-350
D7 Dana 70 – Limited Slip 5300 4.10
E1 Ford – Limited Slip 3.73
E2 Dana 70 HD – Limited Slip 7400 4.10
E3 Limited Slip 4.30 F-350
E5 Ford Limited Slip 8200 4.10
E6 Limited Slip 4.56 F-350
EW Limited Slip 4.88 F-350
F1 Limited Slip 3.73 F-350
F2 Limited Slip 4.10 F-350
F3 Limited Slip 4.30 F-350
F5 Ford 10.25 -Limited Slip 8250 4.10
F6 Limited Slip 4.56 F-350
F9 Ford Limited Slip 8250 3.55
G2 Dana Limited Slip 6300 4.10
G3 Dana Limited Slip 6300 3.54
G3 Limited Slip 4.30 F-450
G5 Limited Slip 5.38 F-450
G8 Limited Slip 4.88 F-450
GW Limited Slip 4.10 F-450
H3 Ford 9″ Limited Slip 3750 2.75 1981-1982
H3 Ford 8.8 Limited Slip 3800 4.11 1985-1986
H4 Ford 9″ Limited Slip 3750 3.00 1981-1986
H5 Ford 9″ Limited Slip 3750 3.25 1981-1982
H5 Ford Limited Slip 3.31
H5 Ford 9″ Limited Slip 3750 2.73 1983
H5 Ford Limited Slip 3800 4.10 1991
H6 Ford 9″ Limited Slip 3750 3.50
H6 3.73 Expedition
H7 Ford 9″ Limited Slip 3750 2.47
H7 Ford 8.8″ Limited Slip 3800 3.31 1995 / Expedition
H8 Ford 8.8″ Limited Slip 3800 3.08 1983-1986
H9 Ford 8.8″ Limited Slip 3800 3.55 1983-1986 and Expedition
K5 Limited Slip 5.38 F-550
K8 Limited Slip 4.88 F-550
KW Limited Slip 4.10 F-550
L3 Electric Locker 3.31
L5 Electric Locker 3.15
L6 Electric Locker 3.73 2011
L9 Electric Locker 3.55
W5 Ford – Limited Slip 8250 4.10 1995

 

2004 Ford Super Duty Axle Codes:

31 — 3.73 non-limited slip, F-250/Excursion
32 — 4.10 non-limited slip, F-250
41 — 3.73 non-limited slip, F-350
61 — 3.73 non-limited slip, F-350
73 — 4.30 non-limited slip, F-450
75 — 5.38 non-limited slip, F-450
78 — 4.88 non-limited slip, F-450
81 — 3.73 non-limited slip, F-350
88 — 4.88 non-limited slip, F-350
95 — 5.38 non-limited slip, F-550
98 — 4.88 non-limited slip, F-550
C1 — 3.73 limited slip, F-250/Excursion
C2 — 4.10 limited slip, F-250/Excursion
C3 — 4.30 limited slip, F-250/Excursion
D1 — 3.73 limited slip, F-350
D2 — 4.10 limited slip, F-350
D3 — 4.30 limited slip, F-350
E2 — 4.10 limited slip, F-350
E3 — 4.30 limited slip, F-350
EW — 4.10 limited slip, F-350 (ambulance package)
F1 — 3.73 limited slip, F-350
F2 — 4.10 limited slip, F-350
F6 — 4.56 limited slip, F-350
G3 — 4.30 limited slip, F-450
G5 — 5.38 limited slip, F-450
G8 — 4.88 limited slip, F-450
GW — 4.88 non-limited slip, F-450
K5 — 5.38 limited slip, F-550
K8 — 4.88 limited slip, F-550
KW — 4.10 non-limited slip, F-550

2007 Ford Super Duty Axle Codes:

37 — 3.73 non-limited slip
3L — 3.73 limited slip
41 — 4.10 non-limited slip
43 — 4.30 non-limited slip
48 — 4.88 non-limited slip
4L — 4.30 limited slip
4N — 4.10 limited slip
4W — 4.10 limited slip (ambulance package)
53 — 5.38 non-limited slip
5L — 5.38 limited slip
8L — 4.88 limited slip

2008 Ford Super Duty Axle Codes:

35 = 3.55 non-limited slip
3J = 3.55 limited slip
37 = 3.73 non-limited slip
3L = 3.73 limited slip
4L = 4.30 limited slip
4N = 4.10 limited slip

2011 Ford Super Duty Axle Codes:

31 – 3.31 Non-Limited Slip
35 – 3.55 Non-Limited Slip
37 – 3.73 Non-Limited Slip
3E – 3.73 Electronic Locking
3H – 3.31 Electronic Locking
3J – 3.55 Electronic Locking
3L – 3.73 Limited Slip
41 – 4.10 Non-Limited Slip
43 – 4.30 Non-Limited Slip
48 – 4.88 Non-Limited Slip
4E – 4.10 Electronic Locking
4L – 4.30 Limited Slip
4M – 4.30 Electronic Locking
4N – 4.10 Limited Slip
4W – 4.10 Limited Slip (Ambulance)
8L – 4.88 Limited Slip

More Codes:

Axle Code

Positraction

Ratio
005-J Limited Slip Differential  3.27
12 Conventional non-Positraction Differential

2.73
16 Conventional non-Positraction Differential

3.73
17 Conventional non-Positraction Differential

3.31
18 Conventional non-Positraction Differential

3.06
19 Conventional non-Positraction Differential

3.55
23 Conventional non-Positraction Differential

3.54
24 Conventional non-Positraction Differential

3.54
25 Conventional non-Positraction Differential

4.10
026-F Conventional non-Positraction Differential  2.73
29 Conventional non-Positraction Differential

3.55
31 Conventional non-Positraction Differential

3.73
32 Conventional non-Positraction Differential

4.10
33 (1992-1998) Conventional non-Positraction Differential

3.54
33 (1999-2002) Conventional non-Positraction Differential

4.30
34 Conventional non-Positraction Differential

3.73
35 Conventional non-Positraction Differential

4.10
36 Conventional non-Positraction Differential

4.56
39 Conventional non-Positraction Differential

3.55
040-L Conventional non-Positraction Differential  3.08
41 Conventional non-Positraction Differential

3.73
42 Conventional non-Positraction Differential

4.10
43 Conventional non-Positraction Differential

4.30
45 Conventional non-Positraction Differential

4.10
46 Conventional non-Positraction Differential

4.56
49 Conventional non-Positraction Differential

3.55
52 Conventional non-Positraction Differential

4.10
054-J Conventional non-Positraction Differential  3.27
56 Conventional non-Positraction Differential

4.10
58 Conventional non-Positraction Differential

4.86
61 Conventional non-Positraction Differential

3.73
62 Conventional non-Positraction Differential

4.10
63 Conventional non-Positraction Differential

4.30
65 Conventional non-Positraction Differential

4.10
66 Conventional non-Positraction Differential

4.56
68 Conventional non-Positraction Differential

4.88
69 Conventional non-Positraction Differential

3.55
72 Conventional non-Positraction Differential

4.63
73 (1996-2000) Conventional non-Positraction Differential

5.13
73 (2002) Conventional non-Positraction Differential

4.30
75 (2002 Motor home – Dana 80) Conventional non-Positraction Differential

Supply Bill of Material Number
75 Conventional non-Positraction Differential

5.38
78 Conventional non-Positraction Differential

4.88
81 Conventional non-Positraction Differential

3.73
82 Conventional non-Positraction Differential

4.10
83 Conventional non-Positraction Differential

4.30
86 Conventional non-Positraction Differential

4.56
88 Conventional non-Positraction Differential

4.88
95 (2002 Motor home – Dana 135) Conventional non-Positraction Differential

Supply Bill of Material Number
95 Conventional non-Positraction Differential

5.38
98 Conventional non-Positraction Differential

4.88
102-A Conventional non-Positraction Differential  3.31
113-A Limited Slip Differential  3.73
114-A Conventional non-Positraction Differential  3.73
126-N Conventional non-Positraction Differential  3.55
127-N Limited Slip Differential  3.55
130-N Conventional non-Positraction Differential  4.10
131-N Limited Slip Differential  4.10
168-S  Conventional non-Positraction Differential  4.10
169-S Limited Slip Differential  4.10
189-S Conventional non-Positraction Differential  4.10
192-S Limited Slip Differential  4.10
199-R Limited Slip Differential  4.10
203-B Limited Slip Differential  2.73
209-E Limited Slip Differential  3.27
221-C Limited Slip Differential  2.73
223-C Limited Slip Differential  2.73
225-C Limited Slip Differential  3.08
227-C Limited Slip Differential  3.08
229-C Limited Slip Differential  3.27
231-C Limited Slip Differential  3.27
262-C Conventional non-Positraction Differential  2.73
264-C Conventional non-Positraction Differential  2.73
348F Conventional non-Positraction Differential  3.27
350-F Conventional non-Positraction Differential  3.08
352-F Conventional non-Positraction Differential  3.08
354-F Conventional non-Positraction Differential  3.73
355-F Limited Slip Differential  3.55
356-F Conventional non-Positraction Differential  3.27
357-F Limited Slip Differential  3.55
359-F Limited Slip Differential  3.73
362-F Conventional non-Positraction Differential  3.45
363-F Limited Slip Differential 3.73
366-F Conventional non-Positraction Differential 3.45
367-F Limited Slip Differential 3.73
368-F Conventional non-Positraction Differential 3.73
370-F Conventional non-Positraction Differential  3.73
371-F Limited Slip Differential  4.10
372-F Conventional non-Positraction Differential  4.10
374-F Conventional non-Positraction Differential  4.10
430-F Conventional non-Positraction Differential  3.07
434-F Conventional non-Positraction Differential  3.27
501-F Limited Slip Differential  3.27
502-F Conventional non-Positraction Differential  3.27
511-F Limited Slip Differential   3.27
515-F Conventional non-Positraction Differential   3.27
610-B Conventional non-Positraction Differential  3.27
612-B Conventional non-Positraction Differential  3.55
613-B Limited Slip Differential  3.73
614-B Conventional non-Positraction Differential  3.73
615-C Limited Slip Differential  4.10
616-B Conventional non-Positraction Differential  4.10
619-A Limited Slip Differential  3.37
621-A Limited Slip Differential  3.73
625-A Limited Slip Differential  3.27
668-H Conventional non-Positraction Differential  4.10
674-F Conventional non-Positraction Differential  3.55
675-F Limited Slip Differential  3.55
696-H Conventional non-Positraction Differential  3.73
697-H Limited Slip Differential  3.73
699-H Limited Slip Differential  4.10
710-A Conventional non-Positraction Differential  3.55
711-A Limited Slip Differential  3.55
740-P Conventional non-Positraction Differential  3.31
746-A Conventional non-Positraction Differential  3.55
747-A Limited Slip Differential  3.55
802-C Conventional non-Positraction Differential  3.31
820-C Conventional non-Positraction Differential  3.55
821-C Limited Slip Differential  3.31
825-C Limited Slip Differential  3.55
832-J Conventional non-Positraction Differential  3.31
833-J Limited Slip Differential  3.31
835-J Limited Slip Differential  3.08
845-M Limited Slip Differential  4.10
852-A Conventional non-Positraction Differential  3.08
862-B Conventional non-Positraction Differential  3.55
869B Limited Slip Differential  3.55
900-A Conventional non-Positraction Differential  3.08
908-A Conventional non-Positraction Differential  3.55
909-A Limited Slip Differential  3.55
930-A Conventional non-Positraction Differential  3.31
935-C Limited Slip Differential  3.73
947F Conventional non-Positraction Differential  4.63
948F Conventional non-Positraction Differential  5.13
950-A Conventional non-Positraction Differential  3.08
954-A Conventional non-Positraction Differential  3.31
956-A Conventional non-Positraction Differential  3.55
958-A Conventional non-Positraction Differential  3.73
B4 Limited Slip Differential

3.73
B5 Limited Slip Differential

4.10
B9 Limited Slip Differential

3.55
C1 Limited Slip Differential

3.73
C2 Limited Slip Differential

4.10
C3 (1992-1998) Limited Slip Differential

3.54
C3 (1999-2002) Limited Slip Differential

4.30
C4 Limited Slip Differential

3.73
C5 Limited Slip Differential

4.10
C6 Limited Slip Differential

4.56
C9 Limited Slip Differential

3.55
D1 Limited Slip Differential

3.73
D2 Limited Slip Differential

4.10
D3 Limited Slip Differential

4.30
D5 Limited Slip Differential

4.10
D6 Limited Slip Differential

4.56
D403A Conventional non-Positraction Differential  3.54
D404A Conventional non-Positraction Differential  3.73
D454A Limited Slip Differential  3.73
D607A Conventional non-Positraction Differential  4.10
D615J Conventional non-Positraction Differential  4.09
D630J Conventional non-Positraction Differential  3.54
D631A Conventional non-Positraction Differential  4.10
D632A Conventional non-Positraction Differential  3.73
D654A Limited Slip Differential  3.54
D808A Limited Slip Differential  4.10
E1 Limited Slip Differential

3.73
E2 Limited Slip Differential

4.10
E3 Limited Slip Differential

4.30
E6 (1992-1998) Limited Slip Differential

4.10
E6 (1999-2002) Limited Slip Differential

4.56
EW (1992-1999) Limited Slip Differential

4.10
EW (2000-2002) Limited Slip Differential

4.88
F1 Limited Slip Differential

3.73
F2 Limited Slip Differential

4.10
F3 Limited Slip Differential

4.30
F5 Limited Slip Differential

4.10
F6 Limited Slip Differential

4.56
F8 Limited Slip Differential

4.88
G3 Limited Slip Differential

4.30
G5 Limited Slip Differential

5.38
G8 Limited Slip Differential

4.88
GW Limited Slip Differential

4.10
H5 Limited Slip Differential

4.10
H7 Limited Slip Differential

3.31
H8 Limited Slip Differential

3.08
H9 Limited Slip Differential

3.55
K5 Limited Slip Differential

5.38
K8 Limited Slip Differential

4.88
KW Limited Slip Differential

4.10
W5 Limited Slip Differential

4.00

1977 Ford Axle Codes:

Below is a axle code chart from 1977: