Although similar internally, GM and Dodge/Ram versions of the axle assembly are not interchangeable due to differences in the axle tubes, hubs, and brake/suspension mounting bracketry, although both use 30 spline axle shafts. Early GM units (until the 2014 model year) relied on a paper differential cover gasket while later GM and all Dodge/Ram assemblies employ a reusable rubber gasket, prompting simplified maintenance. ACDelco 23445892 is cross compatible across both variations for all model years and replaces the early GM paper gaskets. The 2014+ AAM axle for Ram applications features provisions for the Ram 2500/3500 rear coil spring suspension system and thus is not cross compatible with any of the leaf spring applications.
AAM 11.50 Differential Specs
Manufacturer: |
American Axle & Manufacturing |
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Years Produced: |
2001 - 2019 |
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Applications: |
2001 - 2019 Chevrolet Silverado/GMC Sierra 2500HD, 3500HD |
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Housing Material: |
Cast iron |
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Differential Type: |
Full floating rear differential |
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Ring Gear Diameter: |
11.50 in |
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Axle Spline Count: |
30 spline |
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GAWR: |
~10,000 lbs (GM rates @ max 9,375 lbs, Ram rates @ max 9,750 lbs) |
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Ratios: |
GM Applications |
3.73 : 1, 4.10 : 1, 4.63 : 1 |
Dodge/Ram Applications: |
3.42 : 1, 3.73 : 1, 4.10 : 1 |
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Carrier Break(s): |
None |
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Drain Plug Torque: |
34 - 54 ft-lbs (25 - 40 N-m) |
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Fill Plug Torque: |
34 - 54 ft-lbs (25 - 40 N-m) |
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Differential Cover Bolt Torque: |
43 - 62 ft-lbs (32 - 46 N-m) |
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Differential Cover Gasket[1]: |
||
Lube Oil Spec[2]: |
GM Applications |
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Dodge/Ram Applications: |
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Lube Oil Capacity[3]: |
3.8 - 4.2 U.S. quarts |
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Identification: |
14 bolts securing differential housing to cover |
[1] - Although ACDelco is GM's service brand, this reusable differential cover is cross compatible with all Dodge/Ram Trucks applications.
[2] -
Dodge/Ram applications recommend a 75W-140 gear oil for heavy towing applications; a full synthetic gear oil must be used in any case.
[3] - Oil capacity is nominal; always fill differential housing to bottom of fill plug with vehicle parked on level ground.
Source(s)
American Axle & Manufacturing
General Motors; 2001 - 2019 GMC Sierra/Chevrolet Silverado owners manuals
Dodge/Ram Trucks; 2003 - 2019 Ram 2500/3500 owners manuals