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Axle Ratios or Axle Codes
If you have the rear axle's code from the Certification Label on the driver's door jamb you can find the axle ratio, as well as the load rating, in the following tables. However, that's not really true for the front axle, as discussed below |
Front Axle Codes
While the parts catalog says "The third digit of the axle code identifies the ratio and/or capacity of the front axle", that is not true. As seen below, there are only 4 codes (2 - 5) and they do not define the axle ratio nor capacity. In fact, to find the front axle ratio you need the codes off the axle itself, as shown here:
While the parts catalog says "The third digit of the axle code identifies the ratio and/or capacity of the front axle", that is not true. As seen below, there are only 4 codes (2 - 5) and they do not define the axle ratio nor capacity. In fact, to find the front axle ratio you need the codes off the axle itself, as shown here:
Here are the "Front Axle Codes".
Rear Axle Codes:
And here are the rear axle codes. Note that the same code is used to indicate different things for different years, so make sure you find your truck's year in the 2nd column.
And here are the rear axle codes. Note that the same code is used to indicate different things for different years, so make sure you find your truck's year in the 2nd column.
| REAR AXLE RATIO CODES | ||||||
| CODE | YEAR | RATIO | CAPACITY | MANUFACTURER | DESCRIPTION | |
| NAME | MODEL | |||||
| A1 | 80/81 | 2.75 | 2.8M | Ford | Limited Slip | |
| 83 | 2.75 | 2.8M | Ford | |||
| A2 | 81 | 3.00 | 2.8M | Ford | Limited Slip | |
| 85/ | 4.10 | 2.77, 2.79M | Ford | Locking | ||
| A3 | 88/ | 3.45 | 2.77, 2.79M | Ford | Locking | |
| A4 | 81 | 3.25 | 2.8M | Ford | Limited Slip | |
| 85/ | 3.73 | 2.77, 2.79M | . Ford | Locking | ||
| A7 | 81 | 2.47 | 2.8M | Ford | Limited slip | |
| B1 | 83 | 3.00 | 5.3M | Dana (Spicer) | Limited slip | |
| 84/85 | 4.10 | 5.3M | Dana (Spicer) | Limited slip | ||
| 89 | 4.10 | 2.77, 2.95M | Ford | Locking | ||
| B3 | 83/86 | 3.54 | 5.3M | Dana (Spicer) | Limited slip | |
| B4 | 85/ | 3.73 | 5.3, 2.95M | Dana (Spicer) | 60/61 | Locking |
| B5 | 80/82 | 3.33 | 5.3M | Dana (Spicer) | 60/61 | Limited slip |
| 85/ | 4.10 | 6.5M | Ford | Limited slip | ||
| 86/ | 4.10 | 5.3M | Ford | Limited slip | ||
| B6 | 83/84 | 3.55 | 4.05M | Ford | Limited slip | |
| B7 | 82 | 3.54 | 5.3M | Dana (Spicer) | 60/61 | Limited slip |
| 85/86 | 3.73 | 8.5M | Ford | Limited slip | ||
| 86 | 3.73 | 5.3M | Dana | Limited slip | ||
| B9 | 85/ | 3.55 | 8.5M | Ford | Limited slip | |
| 86/ | 3.55 | 5.3M | Ford | Limited slip | ||
| Cl | 81/82 | 4.10 | 5.3M | Dana (Spicer) | 60/61 | Limited slip |
| C2 | 81/82 | 3.00 | 5.3M | Dana (Spicer) | 60/61 | Limited slip |
| 83/85 | 4.10 | 6.25M | Dana (Spicer) | Limited slip ("F” Series) | ||
| 85/ | 4.10 | 6.25M 6.34M | Dana (Spicer) | Limited slip (Econoiine) | ||
| 83/84 | 4.10 | 6.34 M | Dana (Spicer) | Limited slip (Econoline) | ||
| 83 | 4 10 | 6.25M | Dana (Spicer) | Limited slip | ||
| C3 | 80 | 3.31 | 5.3M | Dana (Spicer) | 60/61 | Limited slip |
| 83/84 | 3.54 | 6.25M | Dana (Spicer) | Limited slip | ||
| 85/ | 3.54 | 6.34M | Dana (Spicer) | Limited slip (Econoiine) | ||
| C4 | 83/84 | 3.73 | 6.34M | Dana (Spicer) | Limited slip | |
| C5 | 85/ | 4.10 | 6.25M | Ford | Limited slip (Bronco, "F” Series) | |
| C6 | 82 | 373 | 6.34M | Dana (Spicer) | 60/61 | Limited slip |
| C7 | 80/82 | 3.54 | 5.3M | Dana (Spicer) | 60 | Limited slip |
| 82 | 4.10 | 6.34M | Dana (Spicer) | 60/61 | Limited slip | |
| C9 | 85/ | 3.55 | 6.25M | Ford | Limited slip (Bronco, "F” Series) | |
| D1 | 82 | 3.54 | 6.25M | Dana (Spicer) | 60/61 | Limited slip |
| D2 | 83/85 | 4.10 | 7.4M | Dana (Spicer) | Limited slip | |
| 83/84 | 3.45 | 2.5M | Ford | Limited slip (Bronco II) | ||
| D3 | 80/82 | 4.10 | 6.25M | Dana (Spicer) | Limited slip | |
| 83/85 | 3.54 | 7.4M | Dana (Spicer) | Limited slip | ||
| D4 | 83/ | 3.73 | 2.5, 2.64M | Ford | Limited slip (Bronco II) | |
| D5 | 85/ | 4.10 | 7.4M | Ford | Limited slip (Bronco, "F" Series) | |
| D6 | 82 | 3.73 | 7.4M | Dana (Spicer) | 60/61 | Limited slip |
| D7 | 80/82 | 4.10 | 7.4M | Dana (Spicer) | 70 | Limited slip |
| 85/ | 410 | 2.5, 2.64M | Ford | Limited slip | ||
| E2 | 80/ | 4.10 | 7.4M, 7.8M | Dana (Spicer) | 70HD | Limited slip |
| E3 | 83/84 | 3.54 | 7.4M | Dana (Spicer) | Limited slip | |
| E4 | 83/85 | 3.73 | 7.4M | Dana (Spicer) | Limited slip | |
| F3 | 85 | 3.54 | 8.2M | Dana | Locking | |
| F4 | 83/86 | 3,45 | 2.7M | Ford | Locking (Ranger) | |
| F5 | 85/ | 4.10 | 8.25, 11, 11.5M | Ford | Limited slip | |
| 85 | 3.45 | 2.7M | Ford | Limited slip (Ranger) | ||
| F6 | 83/ | 3.73 | 2.7, 2.75M | Ford | Locking (Ranger) | |
| F7 | 84/ | 4.10 | 2.7, 2.75M | Ford | Locking (Ranger) | |
| F9 | 85/86 | 3.55 | 8.25M | Ford | ||
| G2 | 85 | 4.10 | 6.3M Dana (Spicer) | |||
| G3 | 85 | 3,54 | 6.3M | Dana (Spicer) | ||
| H2 | 80 | 3.50 | 3.75M | Ford | Limited slip | |
| H3 | 80/82 | 2.75 | 3.75M | Ford | Limited slip | |
| 85/86 | 4.1 1 | 3.75M | Ford | Locking | ||
| H4 | 80 | 3.25 | 3.75M | Ford | Limited slip | |
| 81/86 | 3.00 | 3.75M | Ford | Limited slip | ||
| H5 | 81/82 | 3.25 | 3.75M | Ford | Limited slip | |
| 83 | 2.73 | 3.75M | Ford | Limited slip | ||
| 87/ | 4.10 | 3.8M | Ford | |||
| H6 | 81/87 | 3.50 | 3.75M | Ford | Limited slip | |
| H7 | 80 | 3.00 | 3.75M | Ford | Limited slip | |
| 81/82 | 2.47 | 3.75M | Ford | Limited slip | ||
| H8 | 83/86 | 3.08 | 3.75M | Ford | Limited slip | |
| 87/ | 3.08 | 3.8M | Ford | Limited slip (Bronco, “F” Series) | ||
| H9 | 83/ | 3.55 | 3.75M | Ford | Limited slip | |
| 87/ | 3.55 | 3.8M | Ford | |||
| K6 | 84/86 | 3.73 | 3.2M | Ford | Locking | |
| W5 | 89 | 4.10 | 6.25M | Ambulance pkg. wide track rear axles | ||
| 01 | 80/82 | 2.75 | 2.8M | Ford | ||
| 02 | 80/82 | 3.00 | 2.8M | Ford | ||
| 04 | 81/82 | 3.25 | 2.8M | Ford | ||
| 07 | 81/82 | 2.47 | 2.8M | Ford | ||
| 12 | 86/ | 4.10 | 2.77, 2.79M | Ford | Aerostar | |
| 87/ | 2.73 | 3.75, 3.8M | Ford | |||
| 13 | 80/82 | 2.75 | 3.75M | Ford | ||
| 85/86 | 4.11 | 3.75M | Ford | |||
| 86/ | 3.45 | 2.77, 2.79M | Ford | Non-locking Aerostar | ||
| 14 | 80/87 | 3.00 | 3.75M | Ford | Non-locking | |
| 86/ | 3.73 | 2.77, 2.79M | Ford | Aerostar — Non-locking | ||
| 15 | 80/82 | 3.25 | 3.75M | Ford | ||
| 83 | 2.73 | 3.75M | Ford | |||
| 16 | 80/87 | 3.50 | 3.75M | Ford | Non-locking | |
| 17 | 81/86 | 2.47 | 3.75M | Ford | ||
| 88 | 2.73 | 38M | Ford | Non-locking | ||
| 18 | 83/ | 3.08 | 3.75M | Ford | Non-locking | |
| 86 | 3.00 | 38M | Ford | |||
| 87/ | 3.08 | 3.8M | Ford | Locking | ||
| 19 | 83/ | 3.55 | 3.75M | Ford | Non-Locking | |
| 87/ | 3.55 | 3.8M | Ford | Locking | ||
| 21 | 83 | 3.00 | 5.3M | Dana (Spicer) | ||
| 22 | 80 | 3.07 | 5.3M | Dana (Spicer) | 61 | |
| 83 | 3.55 | 3.75M | Dana (Spicer) | Limited slip | ||
| 84/85 | 4.10 | 5.3M | Dana (Spicer) | |||
| 23 | 80/81 | 3.31 | 5.3M | Dana (Spicer) | 60/61 | |
| 83/ | 3.54 | 5.3M | Dana (Spicer) | 60/61 | Non-locking | |
| 86/ | 3.45 | 2.77M | Ford | Aerostar | ||
| 24 | 83/ | 3.73 | 5,3M | Dana (Spicer) | 60/61 | Non-locking |
| 86/ | 3.73 | 2.77, 2.95M | Ford | Aerostar | ||
| 25 | 80/82 | 3.33 | 5.3M | Dana (Spicer) | 60/61 | Non locking |
| 85/ | 4.10 | 5.3M | Ford | Regular | ||
| 26 | 83/87 | 3.55 | 3.75M | Ford | Non-lockinq | |
| 27 | 80/82 | 4.10 | 7.4M | Dana (Spicer) | 70 | Non-iocking |
| 84 | 4,10 | 5.3M | Dana (Spicer) | |||
| 85/ | 3.73 | 5.3M | Ford | |||
| 28 | 80/82 | 4.56 | 7.4M | Dana (Spicer) | 70 | |
| 29 | 85/ | 3.55 | 5.3M | Ford | Regular | |
| 31 | 81/82 | 4.10 | 5.3M | Dana (Spicer) | 60/61 | Non-locking |
| 83/86 | 3.07 | 6.34M | Dana (Spicer) | Non-locking (Econoline) | ||
| 83/86 | 3.07 | 6.25M | Dana (Spicer) | (“F” Series) | ||
| 32 | 81/82 | 3.00 | 5.3M | Dana (Spicer) | 60/61 | Non-locking |
| 63/ | 4.10 | 6.34M | Dana (Spicer) | Non-locking (Econoline) | ||
| 83/86 | 4.10 | 6.25M | Dana (Spicer) | (“F” Series) | ||
| 83 | 3.08 | 2.5M | Ford | (Bronco 1!) | ||
| 33 | 83/ | 3.54 | 6.34M | Dana (Spicer) | Non-tocking | |
| 83/85 | 3.54 | 6.25M | Dana (Spicer) | ("F” Series) | ||
| 88/ | 3.45 | 2.77, 2.79M | Dana | Non-locking | ||
| 34 | 83/84 | 3.73 | 6.25M | Dana (Spicer) | (“F” Series) | |
| 63/ | 3.73 | 6.34M | Dana (Spicer) | Non-iocking | ||
| 85 | 3.73 | 6.25M | Dana (Spicer) | (“F" Series) | ||
| 87/ | 3.73 | 2.77, 2.79M | Ford | Regular | ||
| 35 | 85/ | 4.10 | 6.25M | Ford | Regular | |
| 88/ | 4.10 | 8.5M | Regular (FX250) | |||
| 36 | 80/82 | 3.73 | 7.4M | Dana (Spicer) | 70 | Non-locking |
| 37 | 80/82 | 3.54 | 5.3M | Dana (Spicer) | 60/61 | Non-locking |
| 38 | 80/82 | 3.73 | 5.3M | Dana (Spicer) | 60/61 | Non-locking |
| 85/86 | 3.08 | 6.25M | Dana (Spicer) | |||
| 86 | 3.08 | 6.25M | Dana (Spicer) | |||
| 39 | 85/ | 3.55 | 6.25M | Ford | Regular | |
| 88/ | 3.55 | 8.5M | Ford | Regular (FX250) | ||
| 41 | 80/82 | 3.54 | 6.25M | Dana (Spicer) | ||
| 84 | 3.08 | 2.5M | Ford | |||
| 42 | 80/82 | 3.73 | 6.25M | Dana (Spicer) | ||
| 83/86 | 4.10 | 7.4M | Dana (Spicer) | (“F” Series) | ||
| 83/85 | 3.45 | 2.5M | Ford | (Bronco II) | ||
| 86/ | 3.45 | 2.64M | Ford | Regular (Bronco 1!) | ||
| 43 | 80/82 | 4,10 | 6.25M | Dana (Spicer) | ||
| 83/85 | 3.54 | 7.4M | Dana (Spicer) | |||
| 44 | 80/82 | 4.56 | 6.25M | Dana (Spicer) | ||
| 83/85 | 3.73 | 2.5M | Ford | (Bronco II) | ||
| 86/ | 3.73 | 2 64M | Ford | Regular (Bronco II) | ||
| 45 | 85/ | 4,10 | 7.4M | Ford | Regular | |
| 46 | 82 | 3.73 | 6.34M | Dana (Spicer) | Non-locking | |
| 47 | 82 | 4.10 | 6.34M | Dana (Spicer) | Non-locking | |
| 85 | 4.10 | 2.5M | Ford | Non-limited slip | ||
| 86/ | 4.10 | 2.64M | Ford | Regular (Bronco II) | ||
| 49 | 85/ | 3.55 | 7.4M | Ford | Regular | |
| 51 | 80/83 | 3.73 | 7.4M | Dana (Spicer) | 70HD | |
| 52 | 80/ | 410 | 7.4, 7.8M | Dana (Spicer) | 70HD | Non-locking |
| 53 | 80/82 | 4.56 | 7.4M | Dana (Spicer) | 70HD | |
| 83/ | 3.54 | 7.4, 7.8M | Dana (Spicer) | Non-iocking | ||
| 83 | 4.56 | 7.4M | Dana (Spicer) | |||
| 55 | 86 | 3.55 | 3.2M | Ford | Non-limited slip (Ranger) | |
| 62 | 81/82 | 4.10 | 8,1 M | Dana (Spicer) | 70HD | |
| 83/86 | 4.10 | 8.2M | Dana (Spicer) | |||
| 63 | 85/86 | 3.54 | 8.2M | Dana (Spicer) | ||
| 65 | 83/86 | 4.56 | 8.2M | Dana (Spicer) | ||
| 85/ | 4.10 | 8.25M | Ford | Regular | ||
| 69 | 85/ | 3.55 | 8.25M | Ford | Regular | |
| 72 | 83/86 | 3.08 | 2.2M | Ford | ||
| 85 | 4.10 | 6.3M | Dana (Spicer) | |||
| 88/ | 4.63 | 11M | Dana | Non-locking | ||
| 73 | 85 | 3.54 | 6.3M | Dana (Spicer) | ||
| 88/ | 5.13 | 11M | Dana | Non-iocking | ||
| 74 | 83/84 | 3.45 | 2.2M | Ford | ||
| 81 | 85 | 2.73 | 2.7M | Ford | Non-limited slip (Ranger) | |
| 82 | 84/86 | 3.08 | 2.7M | Ford | Regular (Ranger) | |
| 89 | 3.08 | 2.7M | Ford | Regular (Ranger) | ||
| 84 | 83/ | 3.45 | 2.7M | Ford | Regular (Ranger) | |
| 86 | 83/ | 3.73 | 2.7M | Ford | Regular (Ranger) | |
| 87 | 84/ | 4.10 | 2.7M | Ford | Regular (Ranger) | |
| 96 | 84/86 | 3.73 | 3.2M | Ford | Regular (Ranger) | |