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  1. #1
    Join Date
    Feb 2008
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    Langley B.C. ....2007 CHARGER SRT8
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    Differential oil...what weight?

    Hi all...
    Looking at changing the diff oil in a 2005 Magnum AWD... what is the recommended weight and do you HAVE to use a Mop
    ar brand? If not, any suggestions on brands.
    Thanks in advance...

    The Rocket - Made in Canada....



  2. #2
    Join Date
    Jul 2011
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    calgary, alberta
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    differen't weights between front and rear diff, also I used royal purple. They say diff fluid will last the life of your vehicle but I wanted mine changed anyway.

  3. #3
    Join Date
    Mar 2009
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    Rear is 75-140 and front is 75-90 as I remember. Front says fill for life, but I changed mine-takes about 1 qt. Rear needs 1.7 qts. I have usually done Mobil 1 in rear, but last time could only find Royal Purple in correct weight.

    Sent from my SCH-I405 using Tapatalk
    2008 Magnum BB R/T Hemi Registry # 1584 PPP Stage 2 Cam, JBA Shorty Headers, JBA High Flow cats, Heartthrob Exhaust, Eagle Intake, LMI Intake, MTCM, Blue Tops, ProTorque Converter, SRT Rear, Techo Strut Brace, lowered, Tuned by Diablotoona SOLD--2005 Mineral Gray AWD Hemi Registry # 1154

    Quote Originally Posted by Hemissary View Post
    For the work being performed, length is far more important than diameter :^)

  4. #4
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    Mar 2009
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    Also, front has no drain and my siphon tube was too thick, so I used Slim's compressor powered brake bleeder and it sucked it out like a champ! The front diff plug is also a major PITA to get loose

    Sent from my SCH-I405 using Tapatalk

  5. #5
    Join Date
    May 2008
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    make sure you get straight oil as well since you don't have a LSD in the rear. Most stores are carrying Limited Slip additive fluids only these days so look for LS on the bottle and skip it if it does. Stock difs are open and don't need any friction modifier crap in them.

    Bone stock time: 12.832 @ 108.51 with a 2.033 60ft... On GY F1's Full Weight
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    Current mods: Hi-Flows, 180. Volant, PS Cooler, Trans Cooler, SS Brake Lines, B&B exhaust.
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  6. #6
    Join Date
    Dec 2004
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    maine usa
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    The Mopar lubes are top notch. No worries if you can't find Royal Purple or Mobil One.
    FRI Sidewinder cam, Dynatec Headers , BorlaCatback ,TDP - 93 octane dyno tune, 333rwhp/350 ft lbs, Police Pack Oil Cooler, SRT 8 Struts and Nivo's ,Hotchkis sway bars,B Woody end links, 285,000 miles, 275/40/20 Ventus ST's , 1/8th mile 7.707 sec /90.19 mph -- 05 QC4X4 Ram 200,000 mi . Never Trust a Fart

  7. #7
    Join Date
    Aug 2010
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    Do the SRTs need the firction modifier added to them or do their rear ends have a different set up?
    TRINITY 93 CAI tune. Volant CAI. Custom Dynomax Ultra Flo exhaust sytem. Billet Technologies Oil Catch Can, washer cap & shifter plate. Drake Strut Tower Brace. 3 G Customz Right Side Cover & HEMI Half Covers. AMG Paddle Shifters.


  8. #8
    Join Date
    Nov 2009
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    Flint, Michigan
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    i have some ls fluid hanging out already, is it ok to use? i do not have an lsd
    '06 INFERNO RED SRT-8 OPTION GROUPS I,II,III
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  9. #9
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    Quote Originally Posted by Jd3443pd View Post
    Do the SRTs need the firction modifier added to them or do their rear ends have a different set up?
    depends on the year. First gen LX's have an open differential and you should not be using a friction modifier. Only with the introduction of the getrag LSD in later years was it needed, so first gen SRT's are a NO for reference. Most aftermarket options are gear based and should not be using an friction modifier either as that is used only in clutch based LSD's.

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