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Help with Fluids!!!

This is a discussion on Help with Fluids!!! within the General Help forums, part of the LSx Technical Help Section category; Ok guys just for some reference, what kind of tranny (T-56) and rear gear fluid do you guys use and ...

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    Help with Fluids!!!

    Ok guys just for some reference, what kind of tranny (T-56) and rear gear fluid do you guys use and how much do you need and whens a good point to change each?

    Also what about the fuel filter? Same thing, what kind, when do you usually change it?

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    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    T-56 Dexron III ATF
    Rear end Synthetic 75w-90 every 15k to 30k miles
    Fuel Filter ACDelco every 30,000 miles

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    Import Killer SLP00blueSS's Avatar
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    i use the Royal Purple full synthetic in the rear end and change every two summers (10,000 miles) and i change the fuel filter usually every summer but i'am told i'am anal about my stuff...Its incredibly cheap maitnence which is always good....ACDelco fulel filter

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    Senior Member INMY01TA's Avatar
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    If you haven't changed the tranny fluid ever then now's a good time to. 4 quarts dex III. I use Redline D4.

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    Yeah, I've had the car for 2 years now and put 20k miles on it. I jut got to thinking about it and would like to change everything for piece of mind and its about time anyway.

    So 4qrts of Dexron III for the T-56 but change it how often?
    Also, how much gear oil does the rear need?

    Thanks for the info so far guys.

    Oh and what about coolant? How often should you completely flush it?

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    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by TempleU_WS6 View Post
    Yeah, I've had the car for 2 years now and put 20k miles on it. I jut got to thinking about it and would like to change everything for piece of mind and its about time anyway.

    So 4qrts of Dexron III for the T-56 but change it how often?
    Also, how much gear oil does the rear need?

    Thanks for the info so far guys.

    Oh and what about coolant? How often should you completely flush it?
    I'd change the tranny fluid every 20,000-30,000 or so. Rear end takes just under 2 quarts. I use any 80/90 mineral gear oil with 1 bottle GM lsd. Coolant I never completely flush I just drain and refill the radiator every other year. Figure this will keep it clean enough.

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    Member 346ci's Avatar
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    I use GM 75W-90 Synthetic Gear Lube (grape scented), I change it every 50,000 mi.
    AC Delco fuel filter once every spring.

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    How hard is the diff. fluid to change?

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    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by ls1fan74 View Post
    How hard is the diff. fluid to change?
    If you're asking for your GTO I have no idea.

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    Retired NOT tired SteveC's Avatar
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    Do not use synthetic fluid if you have an "Auburn" rearend, if it is a "Torson" you could use either.

    I use 85w-140 dino oil in my torson 3.73 rearend.

    SteveC

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    Quote Originally Posted by SteveC View Post
    Do not use synthetic fluid if you have an "Auburn" rearend, if it is a "Torson" you could use either.

    I use 85w-140 dino oil in my torson 3.73 rearend.

    SteveC
    I've heard that they did either stock. How can you tell the difference?

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    Single Malt rbob93's Avatar
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    I believe the Torsen units were only used in the SS & WS6 package

    Someone correct me if this is wrong
    Last edited by rbob93; 03-30-2009 at 06:09 PM.

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    Member km346's Avatar
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    Quote Originally Posted by rbob93 View Post
    I believe the Torsen units were only used in the SS & WS6 package

    Someone correct me if this is wrong
    from what i understand every f-body got a torsen 99-02 and 93-98 were auburn's...

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    Quote Originally Posted by INMY01TA View Post
    If you're asking for your GTO I have no idea.
    yeah, I was wondering for my car. How difficult is it for you F-bod guys?

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    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by km346 View Post
    from what i understand every f-body got a torsen 99-02 and 93-98 were auburn's...
    Not sure about 93-97 but 98 LS1s got Auburn, it was an option for the Firehawks only after that.

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    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by ls1fan74 View Post
    yeah, I was wondering for my car. How difficult is it for you F-bod guys?
    Once you change the rear cover to one with a drain plug it's a piece of cake.

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    Moderator Cutlass's Avatar
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    For F-body rear, you pull the cover, drain and clean out the insides, scrap the gasket off, install a new gasket and fill through the plug hole.
    GTO is independant rear isn't it? You probably have a drain plug then.

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    Single Malt rbob93's Avatar
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    Quote Originally Posted by km346 View Post
    from what i understand every f-body got a torsen 99-02 and 93-98 were auburn's...
    OK.....did some reasearch & found that 98 & up ls1 F-Body got the Torsen unless ordered with the optional Auburn

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    Quote Originally Posted by Cutlass View Post
    For F-body rear, you pull the cover, drain and clean out the insides, scrap the gasket off, install a new gasket and fill through the plug hole.
    GTO is independant rear isn't it? You probably have a drain plug then.
    Yes it is. I'm fairly new at this, always having FWD-i checked under the back for the first time and go "wtf are those CV shafts?!"

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    Senior Member 1MileCrash's Avatar
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    isn't there a special friction modifier that you are supposed to add into the rear diff fluid when you fill it up? a limited slip diff additive or something along those lines if i'm not mistaken.

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