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Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, Front Diff, Transfer Case, how to change fluid. in Cadillac Escalade Forums; Changed fluids today, great post. Marine pump worked flawless, available at Walmart for $10...
  1. #121
    augdogg is offline Cadillac Owners Member
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    Changed fluids today, great post. Marine pump worked flawless, available at Walmart for $10

  2. #122
    texdlyght's Avatar
    texdlyght is offline Cadillac Owners Member
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    I was wondering if Mobile one synthetic ATF would be alright to use in my transfer case in my 02 AWD Escalade?

  3. #123
    Z71's Avatar
    Z71
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    Re: Front Diff, Transfer Case, how to change fluid.

    Yes according to my Motor Information Guide, as long as its a Dexron III fluid, need 5 pints.


    This information applies to 2007 and prior GM passenger cars and trucks.

    Dexron III is being phased out as a product name. It is being renamed ManualTransmission Fluid and carries p/n 88861800 U.S. (88861801 Canada).

    If fluid p/n 88861800 U.S.(88861801 Canada)is not yet available when servicing a manual transmission or transfer case,Dexron III can be used in its place.

    DO NOT use Dexron VI in place of manual transmission fluid in any manual transmissions or transfer cases that specifyDexron III, as a failure may result.

    - Thanks to Charles Krepp, TAC

  4. #124
    Slapperbar's Avatar
    Slapperbar is offline Cadillac Owners Member
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    Re: Front Diff, Transfer Case, how to change fluid.

    5 is too much, 2 filled the NR3 case in my ESV.

  5. #125
    texdlyght's Avatar
    texdlyght is offline Cadillac Owners Member
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    Re: Front Diff, Transfer Case, how to change fluid.

    Thank you for the replies, I've changed the oil in my front diff and transfer case both with synthetic mobile one oil but I've been reading a few different threads and I've just seen someone talking about an additive that needs to be added to the front and rear diffs. I'd just like to know before something bad happens. Is the "anti-slip" additive really needed?

  6. #126
    48548m is offline Cadillac Owners Fanatic
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    No because these aren't posi's with clutches. Also most synthetic comes with it built in.

  7. #127
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    Z71
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    Re: Front Diff, Transfer Case, how to change fluid.

    2000-2013 Cadillac Escalade, ESV, EXT equipped With a Locking Rear Differential RPO G80

    All light duty trucks/SUVs equipped with RPO G80 make use of a locking differential and the use of additives will delay the engagement of the locking mechanism and may decrease axle life.

    Note-thats not to say you cannot use any gear that says its suitable for use in limited slip differentials. Its the additive that you should not use, different chemistries.


    Note - Rear axle additives are designed for use in limited slip differentials which are normally installed in cars.




  8. #128
    Pitbull14218 is offline Cadillac Owners Fanatic
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    Re: Front Diff, Transfer Case, how to change fluid.

    I just changed he front diff fluid in my 02 EXT, it didnt look dark when it was coming out but in the pan(black) it looked dirty. I used Mobil one 75w90 full synthetic LS........

    Every parts store I went to all the synthetic gear oil was for limited slip differentials... Mobil one said hybrid synthetic for use in either, so I hope it's ok to use.

    I still hear a grinding noise the same as before I changed the gear oil. It might be my transfer case, so ill be doin that next.

  9. #129
    safchin is offline Cadillac Owners Member
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    Re: Front Diff, Transfer Case, how to change fluid.

    just looked up the lucas synthetic sae 75w-90 gear oil trans and diff lube they call it (NEW AND IMPROVED) it has a rating from brookfield viscosity of 80,000 cps.

    ----------

    check the viscosity on lucas sae 75w-90 synthetic new and improved its 80000 not 200000cps

  10. #130
    wilbanks51 is offline Cadillac Owners Member
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    Re: Front Diff, Transfer Case, how to change fluid.

    Thanks a bunch!

  11. #131
    Nice Ride is offline Cadillac Owners Enthusiast
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    Re: Front Diff, Transfer Case, how to change fluid.

    So, 09 ESV Plat AWD Just Syn 70/90 for Front and Rear? No Additive for Rear?

  12. #132
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    Re: Front Diff, Transfer Case, how to change fluid.

    No additives. If you use a limited slip additive you can damage the G80 locking differential. Don't use any GL that has the additive in it either, wrong fluid to use.


    ¨ Optional Equipment (G80 Order Code) on all GM two-wheel and four-wheel drive light trucks and sport utilities.

    Benefits

    ¨ Improved traction differentiates the vehicle relative to other rear wheel and four-wheel drive vehicles on the market.

    ¨

    ¨ Maintenance free; requires no lube additives.

    ¨ Enhanced towing and off-road performance.

    ¨ Patented carbon friction disc technology enhances performance and durability while reducing warranty claims.



    Principles of Operation

    ¨ Wheel speed difference (left to right) in excess of 100 RPM will cause a flyweight mechanism to open and catch a latching bracket.

    ¨ The stopped flyweight will trigger a self-energizing clutch system, which results in the cam plate ramping against a side gear.

    ¨ Ramping increases until both axles turn at the same speed (full lock), which prevents further wheel slip.

    ¨ At speeds above 20MPH, the latching bracket swings away from the governor and prevents lockup from occurring.



    Technical Specifications

    ¨ Automatic locking takes place within a fraction of a second, so smoothly that it is unnoticed by the average driver.

    ¨ Unlocking occurs automatically, once the need for improved traction is gone, and is unnoticeable to the average driver.

    ¨ Compatible with anti-lock brake systems.


  13. #133
    Nice Ride is offline Cadillac Owners Enthusiast
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    Re: Front Diff, Transfer Case, how to change fluid.

    So AMSOIL is not good? Spoke to AMSOIL rep today, he said the additive is already in there Syn Fluid... If it starts to shudder, then add a tube of the Friction Modifier... Again, don't know who to believe, however after reading through many posts, I agree no additives.
    Thanks Z71

  14. #134
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    Re: Front Diff, Transfer Case, how to change fluid.

    By AMSOIL rep, you mean a dealer?

    Whomever, he/she is mistaken, there is no additive in the Severe Gear 75W-90. Look at the website, its does not state there is any additive for limited slip added to it. All it says its compatible, not that it contains any additive. All other brands specifically state on the label that its formulated for limited slip differentials or it contains a limited slip additive.

    I have used the Severe Gear for many years and many miles and no G80 problems in my Denali G80.


    AMSOIL Severe Gear® 75W-90

    AMSOIL Severe Gear is compatible with most limited-slip differentials. If limited-slip differential chatter occurs, add AMSOIL Slip Lock® friction modifier additive

  15. #135
    Nice Ride is offline Cadillac Owners Enthusiast
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    Yes, out of Pennsylvania. Called the 800 number on the web site.

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