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2004-2007 Cadillac CTS-V General Discussion Discussion, Difference between early & late differentials in Cadillac CTS-V Series Forum - 2004 - 2007; Thanks JimmyH for taking the 1 demerit hit as it brings up a question from me. I just got my ...
  1. #46
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    Re: Difference between early & late differentials

    Thanks JimmyH for taking the 1 demerit hit as it brings up a question from me.

    I just got my rear diff replace (3rd gen or 2008 diff) under warranty with 3000 miles and 7 days left on my 05 warranty. hehe

    I also had the hendrix (bad ass) axles installed with it.

    I never had any diff problems with the original, but is the consensus that the problems with noise etc are directly related to the hop and twisting? Also, are their more noise issues with the 2nd or 3rd gen diffs? I am pretty sure the destruction was a direct result of all the hop, but I am hopeing that with the Hendrix alxes, I am good to go for the foreseeable future, if I spelled foreseeable right

    Any comments?

  2. #47
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    Re: Difference between early & late differentials

    Quote Originally Posted by jpoole View Post
    Thanks JimmyH for taking the 1 demerit hit as it brings up a question from me.

    I just got my rear diff replace (3rd gen or 2008 diff) under warranty with 3000 miles and 7 days left on my 05 warranty. hehe

    I also had the hendrix (bad ass) axles installed with it.

    I never had any diff problems with the original, but is the consensus that the problems with noise etc are directly related to the hop and twisting? Also, are their more noise issues with the 2nd or 3rd gen diffs? I am pretty sure the destruction was a direct result of all the hop, but I am hopeing that with the Hendrix alxes, I am good to go for the foreseeable future, if I spelled foreseeable that right

    Any comments?
    You do seem to be in good shape in terms of future reliability. Catastrophic failure was pretty much limited to the first generation of differentials. The only second generation catastrophic failures involved very high horsepower and sticky tires. As far as the issue of becoming noisey that has affected generations 1 & 2. The track record of 3rd generation differentials is not readily evident in this forum. I think this is because: (a) there aren't many installed so far; and (b) many of us were not even aware until recently that there had been a redesign and hence a 3rd generation, so no distinction would have been made in reporting any issues with 3rd generation units.

  3. #48
    ewill3rd is offline Cadillac Technician
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    Re: Difference between early & late differentials

    I took two of those photos and I don't mind at all if you use them.
    I try to leave my photobucket alone so it doesn't mess up things I have posted.
    Not sure when I'll run out of room though.
    I don't use it often so...

    We have replaced many of these over the last year and a half and as I said, where I used to replace 3 or 4 of the Gen 1 or even Gen 2 units I have yet to see a Gen 3 coming back with any sort of complaint.

  4. #49
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    Re: Difference between early & late differentials

    Good info. I am hopeing that the problems with noise is caused by the hop in any of the gens. I am gonna take it easy and then change the fluid, have som Amisol ready to go in (Darkman convinced me with previous posts), after I get 500 miles on it. If the Hendrix axles fix the hop for me, can't really test till broken in (making 4 70 mile trips to hurry the process this weekend) I can give a test of that.

    With all this I will feel I am safe to add some of that horsepower.....

    Ewill3rd please don't let those pics die, they seem to be used in quite alot of posts here buddy......

    Thanks guys.

  5. #50
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    Re: Difference between early & late differentials

    Quote Originally Posted by darkman View Post
    You do seem to be in good shape in terms of future reliability. Catastrophic failure was pretty much limited to the first generation of differentials. The only second generation catastrophic failures involved very high horsepower and sticky tires. As far as the issue of becoming noisey that has affected generations 1 & 2. The track record of 3rd generation differentials is not readily evident in this forum. I think this is because: (a) there aren't many installed so far; and (b) many of us were not even aware until recently that there had been a redesign and hence a 3rd generation, so no distinction would have been made in reporting any issues with 3rd generation units.
    I an unaware that there is a "3rd generation" differential. How would one know that a "3rd gen" diff is installed? Mine, #25873498, was installed November 2008.

  6. #51
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    Re: Difference between early & late differentials

    Quote Originally Posted by Slithering_Joe View Post
    I an unaware that there is a "3rd generation" differential. How would one know that a "3rd gen" diff is installed? Mine, #25873498, was installed November 2008.
    You would tell by part number. The part number I show for mine is 15793756 (Carrier), which was installed in September of 2007 and is 2nd generation. So unless I recorded the number incorrectly you may well have a 3rd generation.

  7. #52
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    Re: Difference between early & late differentials

    I just checked my invoice and 25873498 was the part number. That would seem to be the "3rd gen" Diff.

  8. #53
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    Re: Difference between early & late differentials

    Quote Originally Posted by jpoole View Post
    I just checked my invoice and 25873498 was the part number. That would seem to be the "3rd gen" Diff.
    Great. Now all we need is the address of where the car is parked at night.

  9. #54
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    Re: Difference between early & late differentials

    Quote Originally Posted by darkman View Post
    Great. Now all we need is the address of where the car is parked at night.
    Our dog was from Michael Vick's house.


    Go Eagles!...I think.
    wcryan and wcryan like this.

  10. #55
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    Re: Difference between early & late differentials

    Pretty much anything that was replaced after early 2008 should be the latest diff design.
    GM stock of the old one was used up pretty fast and I think they may have actually scrapped a bunch of them in favor of the newest.

  11. #56
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    Re: Difference between early & late differentials

    Luke, how deep do I have to dig into my piggy bank to purchase the 3rd gen, part #25873498. Digging for change in between the couch cushions now as my 04 whine is not getting any better.

  12. #57
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    Re: Difference between early & late differentials

    Quote Originally Posted by wgbanks View Post
    Luke, how deep do I have to dig into my piggy bank to purchase the 3rd gen, part #25873498. Digging for change in between the couch cushions now as my 04 whine is not getting any better.
    Also Luke - at some point, when enough folks are out of warranty, a group buy might make some sense.

  13. #58
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    Re: Difference between early & late differentials

    Curious - I'm out of warranty - how much does the 3rd gen replacement cost if my 1st gen ever goes ?

    -- Lee

  14. #59
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    Re: Difference between early & late differentials

    GMPartsdirect (for reference only, I do not buy from them) shows an MRSP of $1922.86 and their price of $1693.10 (Base price of $1399.92 + Shipping&Handling of $293.98). $50.00 core charge.

  15. #60
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    Re: Difference between early & late differentials

    I wonder if a 1st Gen diff is an acceptable core for a 3rd gen dif??

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