AAM 11.5 Rear?

Discussion in '5.9L 3rd Gen Cummins' started by catbird7, Dec 20, 2016.

  1. catbird7

    catbird7 Full Access Member

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    Can anyone provide information regarding the original stock / factory supplied rear that would be found in a 2004 Dodge Ram 2500 4X4 5.9 HO with 6-spd (manual) trans.
     
  2. lpennock

    lpennock Full Access Member

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    What do you want to know? Probably a AAM11.5 with 3.73 gears. if LSD, it will be a torsen style so the no friction modifier required. Recommended fluid is 75w90 or 80w90 full synthetic.
     
  3. catbird7

    catbird7 Full Access Member

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    Well, it's my sons truck and I was looking for information regarding the factory aluminum dif cover.
     
  4. catbird7

    catbird7 Full Access Member

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    It is the AAM 11.5 inch (14 bolt). I found MOPAR # 68149258AC covers for sale which claim to fit AAM 11.5 however for some reason everywhere I look it says this cover will not fit his truck??? Did they make different housing configurations of the AAM 11.5" rear?
     
  5. catbird7

    catbird7 Full Access Member

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    Here's a picture of what I bought, now curious if it will fit.

    161836987345-5-1_1024.jpg
     
  6. Grey Wolf

    Grey Wolf Registered User

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    catbird7 likes this.
  7. catbird7

    catbird7 Full Access Member

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    Thanks! I'll check it out.
     
  8. IMJUSTDAVE

    IMJUSTDAVE Registered User

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    I think 04 had different axle company. Or was it just the manual transmission that was different in 06
     
  9. steved

    steved Full Access Member

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    04 would have been a 11.5aam with the HO or 10.5aam with the SO...04.5 was the intro of the 325hp "600" 5.9l and they all got 11.5aam.

    3.73 and 4.10 were both options as was the limited slip...and while the LSD didn't require LSD addirive, sometimes it was necessary to resolve chatter.

    Late 05 got the aluminum G56, prior years had a cast iron NV5600...

    Sent from my SM-G950U using Tapatalk
     
  10. u2slow

    u2slow Plan B

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    The factory AAM1150 'LSD' (I hate the term) is basically a tru-trac (torsen) traction device. There's no chatter in these that a friction modifier will solve.
     
  11. steved

    steved Full Access Member

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    Keep thinking that...been there, done that. Put over 300k on mine...

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  12. u2slow

    u2slow Plan B

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    Heh. There's a special case for everything... much like I leave the friction modifier out of the Jeep to make the trash-lok work better.
     
  13. towcat

    towcat Administrator Staff Member

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    iirc. the AAM 11.5 is the smarter cousin of the GM 14 bolt. the housing and guts may be different, but the cover should be the same.
    don't quote me, I can be very wrong on this.
     
  14. steved

    steved Full Access Member

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    There are still clutch in there that gets squeezed...I used Royal Purple and immediately had chatter...two bottles of Ford modified later and I was good for 200k more miles...
    Sent from my SM-G950U using Tapatalk
     
  15. steved

    steved Full Access Member

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    I used an ORU cover for a GM11.5AAM on my Dodge 11.5AAM...it didn't fit perfect, but it worked well for a lot of miles.

    Sent from my SM-G950U using Tapatalk
     

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