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  1. #1
    Join Date
    Nov 2018
    Post Thanks / Like

    differential swap

    Thinking about swapping out my peg leg 3.06 from my 2006 300 srt8. Going to a 3.92 getrag. what have your drag strip performance gains been with this swap. Not looking to change my whole car just this for now. Also what year Challenger can I get the parts from, axles, hubs, and rear driveshaft from what car also. Thanks! Also if anyone has this stuff for sale, PM me here

  2. #2
    Join Date
    Jan 2013
    Lost Angeles, CA, USA
    Post Thanks / Like
    2009 was the first year of the Getrag
    all srt cars had them, and all manual rt cars had them as well
    they can also be found on certain rt auto cars

    all of the auto cars will have 3.06 gears unless you pull the Getrag out of a (mopar11)
    The 3.92 came in stick shift cars with 20” wheels, which will be all 2009-2014 srt challengers
    the 3.73 came in stick shift cars with 18” wheels, which will be 2009-2014 rt challengers

    the rear driveshaft you need will be from a 2005-2008 rt
    is buy the bolts and 392 coupler from east coast moparts and look for a used diff, half shafts, hubs, drive shaft

    lots of threads here detailing the swap if you search for stuff like “Getrag swap” or “Getrag conversion”
    Thanks SHARKY 370, Srtgreat thanked for this post

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