DANA AXLE IDENTIFICATION
The Bill of Material (BOM) number is used to identify Dana differentials. It is like the VIN number for your axle assembly. The BOM will identify the model number, the gear ratio, the type of differential, and all component parts. Traditional BOM’s are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. On some tags, the first 2 digits don’t appear on the tag, but they must be used to identify the axle. For instance, you might see 5661-1 for the BOM, but the 60 has been dropped, and one would need to use 605561-1. Later BOM’s may start with the first 3 digits of 200, but these are typically not dropped from the tag.
The BOM may be used with the Dana Expert to identify all aspects of this particular axle. Make sure to select the appropriate Light Duty or Heavy Duty section of The Expert.
Need help identifying your differential or not sure which replacement or performance parts you need? Call our staff of experts at 888-382-2953. We’re here to help Monday thru Friday from 8AM to 5PM CDT
GM Vehicles come with a RPO code tag, usually located in the vehicles glovebox or door jamb. These tags have a wealth of information about your specific vehicle’s equipment and specifications. Read more about GM RPO Axle Identification Codes
Need help identifying your differential or not sure which replacement or performance parts you need? Call our staff of differential experts at 1-888-382-2953. We’re here to help Monday thru Friday from 8AM to 5PM CDT
EATON HEAVY AXLE SHAFT IDENTIFICATION
When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy or power. Here at Drivetrain America we have a chart to help you decide what is on the best gearing for your application.
These calculations are assuming a manual transmission at 65 MPH with a gear ratio of 1:1. If you drive an automatic your RPMs will be slightly higher, and if you have overdrive your RPMs will be slightly lower.
|
3.31
|
3.42
|
3.55
|
3.73
|
3.91
|
4.11
|
4.27
|
4.56
|
4.88
|
5.13
|
5.29
|
5.38
|
5.71
|
6.17
|
7.17
|
|
|
27"
|
2677
|
2766
|
2872
|
3017
|
3163
|
3325
|
3454
|
3689
|
3947
|
4150
|
4279
|
4352
|
4619
|
4991
|
5800
|
|
28"
|
2582
|
2668
|
2769
|
2909
|
3050
|
3206
|
3331
|
3557
|
3806
|
4001
|
4126
|
4196
|
4454
|
4813
|
5593
|
|
29"
|
2493
|
2576
|
2674
|
2809
|
2945
|
3095
|
3216
|
3434
|
3675
|
3863
|
3984
|
4052
|
4300
|
4647
|
5400
|
|
30"
|
2410
|
2490
|
2584
|
2715
|
2846
|
2992
|
3109
|
3320
|
3553
|
3735
|
3851
|
3917
|
4157
|
4492
|
5220
|
|
31"
|
2332
|
2409
|
2501
|
2628
|
2755
|
2896
|
3008
|
3213
|
3438
|
3614
|
3727
|
3790
|
4023
|
4347
|
5051
|
|
32"
|
2259
|
2334
|
2423
|
2546
|
2696
|
2805
|
2914
|
3112
|
3331
|
3501
|
3610
|
3672
|
3897
|
4211
|
4894
|
|
33"
|
2191
|
2263
|
2349
|
2469
|
2588
|
2720
|
2826
|
3018
|
3230
|
3395
|
3501
|
3561
|
3779
|
4093
|
4745
|
|
34"
|
2126
|
2197
|
2280
|
2396
|
2512
|
2640
|
2743
|
2929
|
3135
|
3295
|
3398
|
3456
|
3668
|
3963
|
4606
|
|
35"
|
2065
|
2134
|
2215
|
2328
|
2440
|
2565
|
2664
|
2845
|
3045
|
3201
|
3301
|
3357
|
3563
|
3850
|
4474
|
|
36"
|
2008
|
2075
|
2154
|
2263
|
2372
|
2493
|
2590
|
2766
|
2961
|
3112
|
3209
|
3264
|
3464
|
3743
|
4350
|
|
37"
|
1954
|
2019
|
2095
|
2203
|
2308
|
2426
|
2520
|
2692
|
2881
|
3028
|
3123
|
3176
|
3370
|
3642
|
4243
|
|
38"
|
1902
|
1966
|
2040
|
2144
|
2247
|
2362
|
2454
|
2621
|
2805
|
2948
|
3040
|
3092
|
3282
|
3546
|
4121
|
|
39"
|
1854
|
1915
|
1988
|
2089
|
2190
|
2302
|
2391
|
2554
|
2733
|
2873
|
2962
|
3013
|
3198
|
3455
|
4015
|
|
40"
|
1807
|
1867
|
1938
|
2037
|
2135
|
2244
|
2331
|
2490
|
2664
|
2801
|
2888
|
2937
|
3118
|
3369
|
3915
|
|
41"
|
1763
|
1822
|
1891
|
1987
|
2083
|
2189
|
2275
|
2429
|
2599
|
2733
|
2818
|
2866
|
3042
|
3287
|
3819
|
|
42"
|
1721
|
1778
|
1846
|
1940
|
2033
|
2137
|
2220
|
2371
|
2538
|
2668
|
2751
|
2798
|
2969
|
3208
|
3728
|
|
43"
|
1681
|
1737
|
1803
|
1894
|
1986
|
2087
|
2169
|
2316
|
2479
|
2606
|
2687
|
2733
|
2900
|
3134
|
3642
|
|
44"
|
1643
|
1698
|
1762
|
1851
|
1941
|
2040
|
2119
|
2263
|
2422
|
2546
|
2626
|
2670
|
2834
|
3063
|
3559
|
Here's a formula you can use to calculate your vehicle's tire diameter:
(CROSS SECTION WIDTH x 0.ASPECT RATIO x 2 ÷ 25.4) + WHEEL DIAMETER = OVERALL TIRE DIAMETER
For Example: 235/45ZR-1 (235 x 0.45 x 2 ÷ 25.4) + 17 = 25.327"
And here's a formula that you can use to calculate your vehicle's rear axle gear ratio:
RING GEAR TOOTH COUNT ÷ PINION GEAR TOOTH COUNT = GEAR RATIO
For example: 41-tooth ring gear ÷ 10-tooth pinion gear = 4.10
Set-up Specifications
| DIFFERENTIAL | PINION BEARING PRELOAD | 2 CUT | 5 CUT | R.G.BOLT | BEARING CAP | ||
| MODEL | NEW | USED | BACKLASH | BACKLASH | TORQUE | TORQUE | |
| (Inch Pounds) | (.001 inch) | (.001 inch) | (Foot lbs) | (Foot lbs) | |||
| AMC | |||||||
| MODEL 20 | 14-19 | 6-8 | 6-10 | 65 | 65 | ||
| MODEL 35 (Dana 35) | 12-15 | 6-7 | 6-10 | 55 | 55 | ||
| CHRYSLER | |||||||
| 7.25″ | 12-14 | 6-7 | 6-10 | 55 | 50 | ||
| 8″ IFS | 12-15 | 6-8 | 4-8 | 6-10 | 55 | 60 | |
| 8.25″ | 12-15 | 6-8 | 4-8 | 6-10 | 55 | 60 | |
| 8.75″ ’41’ | 13-15 | 6-8 | 6-10 | 55 | 90 | ||
| 8.75″ ’42’ | 15-25 | 7-10 | 6-10 | 55 | 90 | ||
| 8.75″ ’89’ | 14-19 | 6-9 | 6-10 | 55 | 90 | ||
| 9.25″ REAR | 14-19 | 6-9 | 5-9 | 6-10 | 65 | 75 | |
| 9.25″ ZF REAR | 17-22 | 7-10 | 5-9 | 165 | 100 | ||
| AAM 9.25 FRONT | 15-25 | 10-20 | 5-7 | 103 | 63 | ||
| AAM 10.5″ | 15-25 | 8-11 | 5-7 | 6-10 | 175 | 120 | |
| AAM 11.5″ | 20-30 | 8-11 | 5-7 | 6-10 | 175 | 200 | |
| DANA SPICER | |||||||
| DANA 25 | 12-15 | 6-7 | 6-10 | 55 | 50 | ||
| DANA 27 | 12-15 | 6-7 | 6-10 | 55 | 50 | ||
| DANA 28 | 10-13 | 5-6 | 6-10 | 55 | 50 | ||
| DANA 30 | 12-15 | 6-8 | 6-10 | 55 | 60 | ||
| DANA 30 JK | 12-15 | 6-8 | 6-10 | 80 | 60 | ||
| DANA 44 | 14-19 | 6-9 | 6-10 | 55 | 60 | ||
| DANA 44 JK | 22-35 | 12-15 | 6-10 | 135 | 80 | ||
| DANA 50 | 14-19 | 6-9 | 6-10 | 65 | 60 | ||
| DANA 60,61,70U | 17-30 | 8-10 | 6-10 | 110 | 80 | ||
| DANA 70 & 70HD | 20-35 | 8-10 | 6-10 | 110 | 80 | ||
| DANA 80 | 25-40 | 9-11 | 4-10 | 175 | 80 | ||
| S110, S111, S130, S132 | 20-40 | 8-12 | 9-16 | 150 | 140 | ||
| S135 | 10-40 | 8-12 | 9-12 | 120 | 125 | ||
| FORD | |||||||
| 7.5″ | 14-19 | 6-8 | 11-16 | 60 | 60 | ||
| 8.0″ D/O | 12-14 | 6-7 | 10-15 | 60 | 60 | ||
| 8.0" IRS | 14-19 | 8-10 | 6-10 | 80 | 80 | ||
| 8.8″ | 14-19 | 6-8 | 11-16 | 6-10 | 60 | 60 | |
| 9″ OEM R&P | 13-15 | 6-7 | 10-16 | 70 | 60 | ||
| 9″ NON OEM | 13-15 | 6-7 | 6-10 | 70 | 60 | ||
| 9″ DAYTONA | 14-16 | 6-8 | 6-10 | 70 | 60 | ||
| 9-3/8″ | 14-16 | 6-8 | 10-15 | 70 | 60 | ||
| 9.75″ | 15-19 | 6-8 | 8-12 | 6-10 | 75 | 70 | |
| 10.25″ & 10.5″ | 20-35 | 6-8 | 8-12 | 6-10 | 95 | 80 | |
| GM | |||||||
| OLDS/PONTIAC D/O | 14-19 | 6-7 | 6-10 | 55 | 60 | ||
| 63-'79 CORVETTE | 14-19 | 6-8 | 6-10 | 55 | 60 | ||
| DANA 36 CORVETTE | 12-15 | 6-8 | 6-10 | 55 | 55 | ||
| DANA 44 CORVETTE | 14-19 | 6-8 | 6-10 | 55 | 55 | ||
| 55 CHEVY D/O | 14-18 | 6-8 | 6-10 | 55 | 60 | ||
| 7.25″ | 11-14 | 6-7 | 6-10 | 55 | 60 | ||
| 7.5″ | 12-15 | 6-7 | 3-6 | 6-10 | 65 | 60 | |
| 7.625″ | 12-15 | 6-7 | 3-6 | 6-10 | 65 | 60 | |
| 7.75″ | 12-15 | 6-7 | 6-10 | 65 | 60 | ||
| 8″ | 12-15 | 6-7 | 3-6 | 65 | 60 | ||
| 8.2″ | 12-15 | 6-7 | 6-10 | 55 | 60 | ||
| 8.2″ OLDS/PONTIAC | 12-15 | 6-7 | 6-10 | 55 | 60 | ||
| 8.5″ | 14-19 | 6-8 | 3-6 | 6-10 | 65 | 60 | |
| 8.625″ | 14-19 | 6-8 | 3-6 | 6-10 | 65 | 60 | |
| 9.25″ IFS | 15-22 | 7-9 | 5-7 | 6-10 | 75 | 80 | |
| 8.875″ 12 BOLT CAR | 14-19 | 6-8 | 6-10 | 55 | 60 | ||
| 8.875″ 12 BOLT TRUCK | 13-15 | 6-7 | 6-10 | 55 | 60 | ||
| 10.5" AAM w/o SUPPORT | 15-25 | 8-11 | 5-7 | 6-10 | |||
| 10.5″ 14 BOLT w/ SUPPORT | 20-35 | 8-11 | 6-10 | 120 | 136 | ||
| AAM 11.5″ | 20-30 | 8-11 | 5-7 | 6-10 | 175 | 200 | |
| H072 TRUCK | PRESET | 6-10 | 120 | 175 | |||
| New Pinion Marking | ||||||||||
| -4 | -3 | -2 | -1 | 0 | +1 | +2 | +3 | +4 | ||
|
Old Pinion Marking |
+4 | Add .008 | Add .007 | Add .006 | Add .005 | Add .004 | Add .003 | Add .002 | Add .001 | 0 |
| +3 | Add .007 | Add .006 | Add .005 | Add .004 | Add .003 | Add .002 | Add .001 | 0 | Sub .001 | |
| +2 | Add .006 | Add .005 | Add .004 | Add .003 | Add .002 | Add .001 | 0 | Sub .001 | Sub .002 | |
| +1 | Add .005 | Add .004 | Add .003 | Add .002 | Add .001 | 0 | Sub .001 | Sub .002 | Sub .003 | |
| 0 | Add .004 | Add .003 | Add .002 | Add .001 | 0 | Sub .001 | Sub .002 | Sub .003 | Sub .004 | |
| -1 | Add .003 | Add .002 | Add .001 | 0 | Sub .001 | Sub .002 | Sub .003 | Sub .004 | Sub .005 | |
| -2 | Add .002 | Add .001 | 0 | Sub .001 | Sub .002 | Sub .003 | Sub .004 | Sub .005 | Sub .006 | |
| -3 | Add .001 | 0 | Sub .001 | Sub .002 | Sub .003 | Sub .004 | Sub .005 | Sub .006 | Sub .007 | |
| -4 | 0 |
Sub .001 |
Sub .002 | Sub .003 | Sub .004 | Sub .005 | Sub .006 | Sub .007 | Sub .008 | |