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  #1  
Old 07-22-2013, 05:52 PM
Tom-G Tom-G is offline
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Default 2013 Ram 1500 Rear Axle Part Numbers and LSD Cross Reference

The question comes up on the forum from time to time on the various rear axle part numbers and whether the Limited Spin Differential is included. As far as I can tell, here is the list of axle part numbers (the complete rear axle including the diff.), production codes, ratios, and diff type.

68142573AC DMC, 3.21 Open
68142574AC DMD 3.55, Open
68142575AC DMD & DSA, 3.55 with LSD
68142576AC DMH, 3.92 Open
68142577AC DMH & DSA, 3.92 with LSD
68142579AC DMF & DSA, 4.10 with LSD
68159839AC DMC & DSA, 3.21 with LSD

I believe this information is correct. If anyone else can add to the list or correct any mistakes, please do.

Hope this is helpful.
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Old 07-22-2013, 08:14 PM
rraulston rraulston is offline
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this matches what I have...577AC
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Old 07-22-2013, 10:31 PM
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gcscott gcscott is offline
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Quote:
Originally Posted by Tom-G View Post
The question comes up on the forum from time to time on the various rear axle part numbers and whether the Limited Spin Differential is included. As far as I can tell, here is the list of axle part numbers (the complete rear axle including the diff.), production codes, ratios, and diff type.

68142573AC DMC, 3.21 Open
68142574AC DMD 3.55, Open
68142575AC DMD & DSA, 3.55 with LSD
68142576AC DMH, 3.92 Open
68142577AC DMH & DSA, 3.92 with LSD
68142579AC DMF & DSA, 4.10 with LSD
68159839AC DMC & DSA, 3.21 with LSD

I believe this information is correct. If anyone else can add to the list or correct any mistakes, please do.

Hope this is helpful.
This information is correct for this axle!!! Added one letter. Info is off my build sheet.

68142575AC DMD & DSAP, 3.55 with LSD
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Old 12-21-2013, 12:37 PM
MongoSJ MongoSJ is offline
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Just took delivery of a 1500 4x4 built last month. The window sticker calls out anti-spin and the build sheet shows DSA anti-spin. When I look at the axle itself I see a different part number than referenced above for LSD. Maybe a revision (AC to AD). Would like to verify if I do have LSD. With the tires off the ground spinning one wheel has the opposing wheel spin the opposite direction. I thought all mechanical type LSDs spun the rear wheels in the same direction. Here is the part number on the axle itself.

P68142577AD 3.92

If it's a revision anyone know what changed?
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Old 12-21-2013, 12:49 PM
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bouf0010 bouf0010 is offline
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yeah youre good, AD is just for the new year - it acts like an open diff until the wheel slips.
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Old 12-21-2013, 01:14 PM
MongoSJ MongoSJ is offline
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Thanks, bouf0010
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Old 03-30-2014, 10:26 AM
RaymondT RaymondT is offline
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Not a lot of guesswork on my 2014. The tag in the very center bottom of the pumpkin says "3.92 OPN DS" after I scraped a little black paint off.
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