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All 1994-1999 Dana 60 Front Axles in Dodge Ram 2500 and Ram 3500 trucks had a Bill of Material Number (BOM) stamped on a Axle ID Build Tag attached to the differential by two of the differential cover bolts when the vehicle was shipped from the factory but, unfortunately, these tags are often missing on trucks that had prior differential service. The BOM number is a 6 digit number beginning with a 6 plus a dash number (ex: 610604-2). They can be used to determine not only the axle model, but also what components the axle was originally built with. We often ask for this number to insure we provide you with the exact parts you need for your truck.
Each different BOM number signifies an engineering part change which may be minor or major and may involve one or more parts. The dash number indicates the axle ratio. For 1994-1999 Ram 2500 and 3500 trucks built for civilian use, 3.54 ratio is a -1, 4.10 ratio is -2.
| Ram 2500 Bill of Material Numbers by Year | 1994: 610426, 610440 1995: 610539, 610518 1996: 610518, 610604, 610616, 610617 1997: 610635, 610636, 610708, 610727, 610728, 610745, 610746,610738, 610739 1998: 610808, 610810, 610719, 610720 1999: 610788, 610828, 610829 |
| Ram 3500 Bill of Material Numbers by Year | 1994: 610428 1995: 610540, 610517 1996: 610517, 610605, 610618, 610619 1997: 610637, 610638, 610729, 610730 1998: 610723, 610809, 610811 1999: 610789, 610791, 610830 |
| Military Air Force Tow Vehicle Bill of Material Numbers. All have 7.17 ratio gear sets | 1995: 610532-1 1996: 610532-1, 610622-1 1997: 610714-1 1998: None Listed 1999: 610832-1 |
