There's no question, the easiest way to place the beam and gear ratio in your truck is from the door sticker. If y'all open the drivers door and expect at the door jamb, you lot'll see a sticker similar the one shown below:

Yous'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 nautical chart below to identify it. If for some reason you detect a code missing from the nautical chart and would similar to add together it, please utilize the Contact Page.

You'll discover that there are some codes with different gear ratio'south listed. Unfortunately, the same codes were reused in different years. If yous have whatever more information to aid narrow these codes downwards, please utilise the Contact Page.

Axle Code
(Door Sticker)

Axle Chapters 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.xi 1985-1986
14 Ford nine″ 3750 iii.00 1981-1986
15 Ford 9″ 3750 3.25 1981-1982
15 Not Limited Sideslip 3.31
15 Ford 9″ 3750 2.73 1983
fifteen Ford nine″ 3750 iii.fifteen
16 Ford 9″ 3750 3.50
xvi Ford 3.73
17 Ford 3300 three.25 1971
17 Ford 3800 3.31 1995 / 1999-2002 / Trek
17 Ford three.55 1998
17 Ford 3.73 1997
17 Ford 9″ 3750 2.47
xviii Ford 8.8 3800 3.08 1983-1986
19 Ford 8.eight 3800 3.55
22 Dana 5300 4.x
23 Dana sixty 5300 3.54
24 Dana 60 5300 3.73 Econoline
25 Ford 5300 iv.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 iii.73
27 Dana lxx 7400 four.10
28 Dana lxx 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 four.10 Econoline
32 Dana 61 5300 iii.00
33 Dana 61 6250 iii.54
33 Ford four.30 F-250
34 iii.73 Econoline
35 4.09 Econoline
35 Ford 6250 4.ten 1991
36 Dana 70 7400 three.73 1980
36 four.56 F-250
37 Dana threescore 5300 3.54
37 Not Express Skid 3.73 Super Duty
3L Limited slip 3.73 Super Duty
38 Ford 6250 3.08
38 Dana threescore 5300 three.73
39 Ford 10.25 6250 three.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 iv.ten
43 Dana 7400 3.54
43 Dana 6250 iv.10
43 4.30 F-350
4L Limited Skid 4.30 Super Duty
4N Limited Slip iv.ten Super Duty
4W Limited Slip 4.10 Ambulance Package
44 Dana 6250 four.56
45 Ford 7400 4.10 1991
46 4.56 F-350
48 Non Express Slip 4.88 Super Duty
49 Ford ten.25 7400 3.55 1991
51 Dana seventy Hard disk drive 7400 3.73
52 Dana lxx HD 7400 4.10 Econoline
53 Dana seventy Hard disk 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 four.10
63 Dana 8200 iii.54
63 four.30 F-350
65 Ford 8250 4.10 1991
66 four.56 F-350
69 Ford ten.25 8250 3.25
69 Ford 8250 3.55 1991
72 Dana 6300 iv.10
72 Dana 11000 4.63
73 Dana 6300 iii.54
73 Dana 11000 5.thirteen
73 4.30 F-450
75 5.38 F-450
78 iv.88 F-450
81 3.73
81 four.63 Econoline
82 iv.10 F-350
83 4.30 F-350
86 four.56 F-350
88 4.88 F-350
8L Limited Slip 4.88 Super Duty
95 five.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 three.33
B5 Ford 10.25 – Limited Skid four.10
B6 Ford – Express Slip 5300 iii.55
B6 Ford – Limited Slip 3.73
B7 Ford – Limited Skid 5300 three.73
B9 Ford 10.25 – Limited Slip 3.55
C1 Ford – Limited Slip 3.73 F-250 / Excursion
C2 Dana 61 – Limited Slip 5300 three.00
C2 Dana 61 – Express Slip 5300 3.54
C2 Dana – Limited Slip 6250 four.10 F-250 / Excursion
C3 Dana Limited Sideslip 6250 3.54
C3 Ford – Limited Skid 4.30 F-250 / Excursion
C5 Ford 10.25 – Express Skid iv.x
C6 Ford – Express Slip 4.56 F-250
C7 Dana sixty – Limited Skid 5300 3.54
C9 Ford 10.25 – Limited Slip 3.55
D1 Limited Slip iii.73 F-350
D2 Limited Slip 7400 4.10
D3 Ford Limited Skid three.54
D3 Dana – Limited Skid 6250 4.10
D3 four.30 F-350
D5 Ford 10.25 – Limited Skid 7400 four.10
D6 Express Skid four.56 F-350
D7 Dana 70 – Limited Sideslip 5300 4.10
E1 Ford – Express Slip iii.73
E2 Dana 70 HD – Limited Slip 7400 4.10
E3 Limited Slip iv.thirty F-350
E5 Ford Limited Slip 8200 four.10
E6 Limited Slip 4.56 F-350
EW Limited Slip 4.88 F-350
F1 Limited Sideslip 3.73 F-350
F2 Limited Slip iv.10 F-350
F3 Limited Slip iv.30 F-350
F5 Ford 10.25 -Limited Sideslip 8250 4.ten
F6 Express Slip 4.56 F-350
F9 Ford Express Skid 8250 iii.55
G2 Dana Limited Slip 6300 4.x
G3 Dana Express Slip 6300 3.54
G3 Limited Slip 4.30 F-450
G5 Limited Skid 5.38 F-450
G8 Limited Slip 4.88 F-450
GW Limited Slip four.10 F-450
H3 Ford 9″ Limited Slip 3750 2.75 1981-1982
H3 Ford eight.8 Limited Slip 3800 4.11 1985-1986
H4 Ford ix″ Limited Slip 3750 iii.00 1981-1986
H5 Ford 9″ Limited Skid 3750 3.25 1981-1982
H5 Ford Limited Slip 3.31
H5 Ford nine″ Limited Slip 3750 2.73 1983
H5 Ford Express Slip 3800 iv.10 1991
H6 Ford 9″ Limited Slip 3750 3.fifty
H6 3.73 Expedition
H7 Ford 9″ Limited Slip 3750 two.47
H7 Ford 8.8″ Express Slip 3800 3.31 1995 / Trek
H8 Ford 8.8″ Limited Sideslip 3800 three.08 1983-1986
H9 Ford 8.8″ Limited Slip 3800 3.55 1983-1986 and Trek
K5 Limited Sideslip five.38 F-550
K8 Limited Slip 4.88 F-550
KW Limited Slip four.10 F-550
L3 Electric Locker 3.31
L5 Electric Locker 3.15
L6 Electrical Locker 3.73 2011
L9 Electric Locker 3.55
W5 Ford – Limited Skid 8250 four.ten 1995

2004 Ford Super Duty Axle Codes:

31 — 3.73 not-limited slip, F-250/Excursion
32 — iv.ten non-express slip, F-250
41 — 3.73 non-limited skid, F-350
61 — three.73 not-limited slip, F-350
73 — 4.30 non-limited slip, F-450
75 — 5.38 non-limited slip, F-450
78 — four.88 not-limited slip, F-450
81 — 3.73 non-limited skid, F-350
88 — 4.88 not-limited skid, F-350
95 — 5.38 non-limited sideslip, 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 express slip, F-250/Excursion
D1 — 3.73 limited sideslip, F-350
D2 — 4.ten limited skid, F-350
D3 — 4.30 limited slip, F-350
E2 — 4.x limited sideslip, F-350
E3 — 4.30 limited skid, F-350
EW — 4.10 express skid, F-350 (ambulance parcel)
F1 — 3.73 limited slip, F-350
F2 — 4.10 limited slip, F-350
F6 — iv.56 express sideslip, F-350
G3 — four.xxx express slip, F-450
G5 — 5.38 limited slip, F-450
G8 — 4.88 express slip, F-450
GW — 4.88 non-express slip, F-450
K5 — v.38 express slip, F-550
K8 — four.88 express slip, F-550
KW — four.10 non-express slip, F-550

2007 Ford Super Duty Beam Codes:

37 — 3.73 non-limited sideslip
3L — 3.73 express sideslip
41 — 4.10 non-limited slip
43 — 4.30 non-limited slip
48 — 4.88 non-limited slip
4L — 4.30 express slip
4N — 4.10 express slip
4W — 4.10 limited slip (ambulance package)
53 — 5.38 not-limited slip
5L — v.38 limited slip
8L — 4.88 express slip

2008 Ford Super Duty Axle Codes:

35 = 3.55 non-limited slip
3J = iii.55 limited slip
37 = 3.73 non-limited skid
3L = iii.73 express slip
4L = 4.30 limited skid
4N = 4.10 limited slip

2011 Ford Super Duty Axle Codes:

31 – 3.31 Not-Limited Sideslip
35 – 3.55 Non-Express Slip
37 – 3.73 Non-Express Skid
3E – 3.73 Electronic Locking
3H – iii.31 Electronic Locking
3J – three.55 Electronic Locking
3L – three.73 Limited Sideslip
41 – 4.x Non-Limited Slip
43 – 4.30 Non-Express Slip
48 – 4.88 Non-Express Slip
4E – 4.10 Electronic Locking
4L – iv.thirty Limited Skid
4M – iv.30 Electronic Locking
4N – four.10 Limited Slip
4W – 4.10 Limited Sideslip (Ambulance)
8L – four.88 Limited Slip

More than Codes:

Axle Code

Positraction

Ratio

005-J Express Slip Differential  3.27
12 Conventional not-Positraction Differential

2.73
sixteen Conventional non-Positraction Differential

three.73
17 Conventional non-Positraction Differential

3.31
18 Conventional non-Positraction Differential

three.06
19 Conventional non-Positraction Differential

3.55
23 Conventional not-Positraction Differential

3.54
24 Conventional not-Positraction Differential

3.54
25 Conventional not-Positraction Differential

four.x
026-F Conventional non-Positraction Differential  ii.73
29 Conventional non-Positraction Differential

3.55
31 Conventional non-Positraction Differential

3.73
32 Conventional non-Positraction Differential

iv.10
33 (1992-1998) Conventional not-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 not-Positraction Differential

3.55
040-L Conventional not-Positraction Differential  3.08
41 Conventional non-Positraction Differential

iii.73
42 Conventional not-Positraction Differential

iv.10
43 Conventional not-Positraction Differential

4.30
45 Conventional non-Positraction Differential

four.10
46 Conventional non-Positraction Differential

4.56
49 Conventional not-Positraction Differential

iii.55
52 Conventional non-Positraction Differential

four.10
054-J Conventional non-Positraction Differential  3.27
56 Conventional non-Positraction Differential

4.10
58 Conventional non-Positraction Differential

four.86
61 Conventional not-Positraction Differential

iii.73
62 Conventional non-Positraction Differential

4.10
63 Conventional non-Positraction Differential

4.30
65 Conventional non-Positraction Differential

iv.10
66 Conventional non-Positraction Differential

iv.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 not-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 not-Positraction Differential

4.88
81 Conventional not-Positraction Differential

three.73
82 Conventional non-Positraction Differential

iv.ten
83 Conventional non-Positraction Differential

four.30
86 Conventional non-Positraction Differential

4.56
88 Conventional not-Positraction Differential

four.88
95 (2002 Motor abode – Dana 135) Conventional non-Positraction Differential

Supply Bill of Material Number
95 Conventional not-Positraction Differential

5.38
98 Conventional non-Positraction Differential

4.88
102-A Conventional non-Positraction Differential  3.31
113-A Limited Sideslip Differential  3.73
114-A Conventional non-Positraction Differential  3.73
126-N Conventional non-Positraction Differential  iii.55
127-North Express Skid Differential  3.55
130-N Conventional not-Positraction Differential  4.10
131-N Limited Skid Differential  4.10
168-S  Conventional non-Positraction Differential  4.10
169-South Limited Slip Differential  4.x
189-Due south Conventional not-Positraction Differential  four.10
192-S Express Slip Differential  4.10
199-R Express Slip Differential  4.10
203-B Limited Sideslip Differential  ii.73
209-E Limited Slip Differential  3.27
221-C Express Slip Differential  two.73
223-C Express Slip Differential  2.73
225-C Limited Slip Differential  iii.08
227-C Limited Slip Differential  iii.08
229-C Express Sideslip Differential  3.27
231-C Limited Slip Differential  3.27
262-C Conventional non-Positraction Differential  two.73
264-C Conventional non-Positraction Differential  2.73
348F Conventional non-Positraction Differential  iii.27
350-F Conventional non-Positraction Differential  3.08
352-F Conventional non-Positraction Differential  iii.08
354-F Conventional non-Positraction Differential  iii.73
355-F Express Sideslip Differential  three.55
356-F Conventional not-Positraction Differential  iii.27
357-F Limited Slip Differential  iii.55
359-F Express 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  iv.10
372-F Conventional non-Positraction Differential  4.10
374-F Conventional non-Positraction Differential  4.x
430-F Conventional non-Positraction Differential  3.07
434-F Conventional non-Positraction Differential  3.27
501-F Limited Sideslip Differential  iii.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  three.27
612-B Conventional non-Positraction Differential  iii.55
613-B Limited Slip Differential  3.73
614-B Conventional non-Positraction Differential  3.73
615-C Limited Skid Differential  four.ten
616-B Conventional non-Positraction Differential  4.10
619-A Limited Slip Differential  3.37
621-A Express Slip Differential  3.73
625-A Limited Slip Differential  3.27
668-H Conventional non-Positraction Differential  4.ten
674-F Conventional non-Positraction Differential  3.55
675-F Limited Slip Differential  iii.55
696-H Conventional non-Positraction Differential  3.73
697-H Limited Slip Differential  3.73
699-H Express Slip Differential  4.10
710-A Conventional not-Positraction Differential  iii.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 not-Positraction Differential  three.31
820-C Conventional non-Positraction Differential  three.55
821-C Express Sideslip Differential  3.31
825-C Express Sideslip Differential  three.55
832-J Conventional non-Positraction Differential  three.31
833-J Limited Slip Differential  3.31
835-J Limited Skid Differential  3.08
845-M Limited Slip Differential  4.10
852-A Conventional non-Positraction Differential  iii.08
862-B Conventional non-Positraction Differential  iii.55
869B Express Sideslip Differential  3.55
900-A Conventional not-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  iii.31
935-C Express Sideslip Differential  iii.73
947F Conventional non-Positraction Differential  4.63
948F Conventional non-Positraction Differential  5.13
950-A Conventional non-Positraction Differential  three.08
954-A Conventional non-Positraction Differential  3.31
956-A Conventional non-Positraction Differential  3.55
958-A Conventional non-Positraction Differential  three.73
B4 Express Slip Differential

3.73
B5 Limited Slip Differential

four.10
B9 Express Sideslip Differential

3.55
C1 Express Sideslip Differential

3.73
C2 Express Sideslip Differential

4.ten
C3 (1992-1998) Express Skid Differential

3.54
C3 (1999-2002) Express Skid Differential

four.30
C4 Limited Slip Differential

3.73
C5 Express Slip Differential

iv.10
C6 Express Slip Differential

4.56
C9 Limited Slip Differential

3.55
D1 Limited Slip Differential

three.73
D2 Limited Skid Differential

iv.10
D3 Limited Slip Differential

4.xxx
D5 Express Slip Differential

4.x
D6 Limited Slip Differential

4.56
D403A Conventional non-Positraction Differential  three.54
D404A Conventional non-Positraction Differential  3.73
D454A Express Slip Differential  3.73
D607A Conventional non-Positraction Differential  4.x
D615J Conventional non-Positraction Differential  4.09
D630J Conventional non-Positraction Differential  iii.54
D631A Conventional non-Positraction Differential  iv.x
D632A Conventional non-Positraction Differential  3.73
D654A Limited Sideslip Differential  iii.54
D808A Limited Slip Differential  iv.10
E1 Limited Slip Differential

3.73
E2 Express Slip Differential

4.10
E3 Express Slip Differential

4.xxx
E6 (1992-1998) Limited Slip Differential

four.ten
E6 (1999-2002) Limited Slip Differential

iv.56
EW (1992-1999) Express Slip Differential

four.10
EW (2000-2002) Limited Slip Differential

4.88
F1 Limited Sideslip Differential

three.73
F2 Limited Slip Differential

iv.ten
F3 Limited Skid Differential

four.xxx
F5 Limited Slip Differential

iv.10
F6 Limited Slip Differential

iv.56
F8 Limited Sideslip Differential

4.88
G3 Limited Slip Differential

4.thirty
G5 Limited Skid Differential

v.38
G8 Limited Skid Differential

4.88
GW Limited Slip Differential

4.ten
H5 Express Slip Differential

4.10
H7 Express Skid Differential

iii.31
H8 Limited Skid Differential

3.08
H9 Express Slip Differential

3.55
K5 Limited Skid Differential

v.38
K8 Limited Slip Differential

four.88
KW Limited Sideslip Differential

iv.x
W5 Limited Slip Differential

iv.00

1977 Ford Axle Codes:

Below is a axle code nautical chart from 1977: