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  1. #16
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    Changing your 15+ zf rear....

    Quote Originally Posted by mf2015 View Post
    I have a question. My 2015 Charger R/T has 220mm rear axles. I notice most differentials say they fit 230. Will I need to replace the axles to make the differential fit?
    No sir , my buddy Brad has gone back and forth multiple times with his 16’ RT(220mm) , using 3.09 ,3.70, and 3.90 gear housings. All being from 230mm axle cars.


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    16’ charger Scatpack
    Forged 392 based 426 stroker, Arrington phase four Apache heads, custom grind cam , ported and matched 6.1 manifold, long tube headers , solo performance cutback ,ati pulley and pinned crank , custom cai , Tba diff brace with 3.70’s out back and 30” et r’s
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  2. #17
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    Apr 2016
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    Awesome! Thanks for the good news!
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  3. #18
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    Ronan, nice write up sir...... I'm hoping to meet up with yah this year
    13 Durango R/T
    13 M6 Challenger R/T
    02 M5 Dakota QC Sport
    91 TKO 600 Dakota CC
    63 Dart 3 on da Tree
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  4. #19
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    Quote Originally Posted by 91DakBuilder View Post
    Ronan, nice write up sir...... I'm hoping to meet up with yah this year
    Absolutely! Time has been eluding me for the past month or two:( I’ve really been wanting to jump into the Hp tuner process and start playing with it. I think I’ve driven my car maybe four times in the last two months Changing your 15+ zf rear.... hopefully now after all the holiday hype I can take some time back and dig in!!


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  5. #20
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    Dec 2014
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    Hey bro, I get it, I just got my car back yesterday. The good news is, I now have a new McLeod clutch and TR-6060 to play with. The bad news I need to send my DSS drive shaft out for repairs. I'm going to do the Second gear carbon syncro upgrade along with the 3-6 hybrid syncro upgrade and brass forks from Tick on this trans before I start beating on it.... I'll get back to tuning once the weather is nicer down here. Just PM me if you need any help.

  6. #21
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    Feb 2019
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    Recommendation on the rear diff oil?

    Just the (expensive) Mopar stuff with a bottle of their Limited Slip additive, or something else?
    2019 Charger Scat Pack

  7. #22
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    Quote Originally Posted by snobrdrdan View Post
    Recommendation on the rear diff oil?

    Just the (expensive) Mopar stuff with a bottle of their Limited Slip additive, or something else?
    Don't need the high dollar Mopar gear oil, any good 75W-90 synthetic with a bottle of the Mopar additive or a half bottle of Trans-X will do.


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    2016 Challenger SRT 392, A8, Technology Group
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  8. #23
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    Feb 2019
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    Quote Originally Posted by Slidd View Post
    Don't need the high dollar Mopar gear oil, any good 75W-90 synthetic with a bottle of the Mopar additive or a half bottle of Trans-X will do.
    thanks

    So even if I went with something like AMSOIL, still use the Mopar additive with it?

  9. #24
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    Oct 2016
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    Quote Originally Posted by snobrdrdan View Post
    Recommendation on the rear diff oil?

    Just the (expensive) Mopar stuff with a bottle of their Limited Slip additive, or something else?
    Mobil 1 is what I used.

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  10. #25
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    Quote Originally Posted by snobrdrdan View Post
    thanks

    So even if I went with something like AMSOIL, still use the Mopar additive with it?
    Some have done that saying that Amsoil and other synthetic oils already had the additive but had to go back later and add some anyway, I would just put some in to be safe.



    Quote Originally Posted by PlumCrazyTN View Post
    Mobil 1 is what I used.

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    Changing your 15+ zf rear....



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  11. #26
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    Quote Originally Posted by Slidd View Post
    Some have done that saying that Amsoil and other synthetic oils already had the additive but had to go back later and add some anyway, I would just put some in to be safe.




    Changing your 15+ zf rear....



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    Exactly like I did. I believe I used Mobil1 that already has a friction modifier, but I also added a small amount trans x as well.


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  12. #27
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    Aug 2016
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    The Mopar gear lube (# 68083381AA ) has friction modifier also and the 4oz bottle is still recommended. for the cost I still add it. my .02
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  13. #28
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    Feb 2017
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    Finally got my 3.09 rear, love it! With the mods I have my little 5.7 is giving cars Hell that normally would laugh at me. They not laughing now! Cam swap is next!
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  14. #29
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    Feb 2019
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    Quote Originally Posted by Mangoman View Post
    Finally got my 3.09 rear, love it! With the mods I have my little 5.7 is giving cars Hell that normally would laugh at me. They not laughing now! Cam swap is next!
    What other mods do you have, if you don't mind me asking?

  15. #30
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    Feb 2019
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    So it looks like there are two (axle) seals, driver & passenger outlet, that could be replaced.
    I just bought a low mileage used 3.09 LSD unit.....I'm gonna guess it'd be worth the $10 (for the two seals) to swap them out?

    And I assume just pry or use a pick tool to pull them out & then lightly tap them in (after a little lube on the rubber) with something that is roughly the size of the new seal?

    The parts I'm seeing/referencing are:
    68084192AA & 68084193AA

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