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Diff Fluid

This is a discussion on Diff Fluid within the GTO forums, part of the Vehicle Specific category; Originally Posted by cammed goat OK. We use AMSoil at my job too. I gotta read the bottle of I ...

  1. #21
    Grand Imperial Wizard Sarge's Avatar
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    Quote Originally Posted by cammed goat View Post
    OK. We use AMSoil at my job too. I gotta read the bottle of I think it's called "SEVERE GEAR" oil. Never seen that stuff before.
    Yeah that is what you should be using....
    http://www.amsoil.com/storefront/svo.aspx

  2. #22
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    That would work for me. I take back roads to and from work hitting stoplights/signs every day.

    Now I know why my job uses Rotella and AMSOil. Good stuff right there.

  3. #23
    Member GTO1_OHIO's Avatar
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    Phantom Black Metallic
    2004 GTO

    Quote Originally Posted by Sarge View Post
    Well the Torco ( conventional oil base) does have a thicker than normal film strength.....and this is why folks over at ls1gto "think" it is better cuz it quietens their rear gears.....but the truth of the matter is quiet is not always better.....Torco has crap add packs for friction modifiers/foam prevenitives/seal conditioners...and frankly Shell Rotella 85-140 at WalMart returns better gear wear numbers than that Torco garbage....
    But the dipshits at ls1gto.com go by their butt dynos and sing Torco's praises.....let em go right ahead...but I prefer data and a return on my investment in lubrication/heat control/long term protection of a quality diff lube like Royal Purple/RedLine/Amsoil all three returning excellent wear numbers....and Oh shock...all three do not require friction modifiers.....this should be a big indicator guys.....
    And yes I have ran and tested Torco against all three mentioned above.....
    .....better on pancakes though.

  4. #24
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    Aunt Jemimah is gonna kick your ass.

  5. #25
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
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    I wonder how much friction mod I would need for the Amsoil? I have a Harrop cover which, I THINK, allows my diff to hold 4 qts. I do not know what the ratio is for the mix of gear oil/friction modifier.

  6. #26
    Grand Imperial Wizard Sarge's Avatar
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    No the Harrop cover takes 5 pints or 2 1/5 quarts. I never used any friction modifier with the Amsoil and had no noises/clatter at all.....

  7. #27
    Smiles for 9.5 Years cammed goat's Avatar
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    Sh!t...my mind is off. That's all the diff holds? So then the prev. owner DID overfill it. Dammit!!!


    extreme dimensions, driveshaft shop, harrop, hid(35watt/6k) lows, hurst, k&n, led fogs, maverick man, mishimoto, nitto, revshift, slp, stern st-1, smoked sidemarkers, whiteline poly radius rod bushings

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    How can you overfill a diff? I mean when it runs out the hole it is full. You cannot put anymore in as it would just run out the hole your putting it in!

  9. #29
    Smiles for 9.5 Years cammed goat's Avatar
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    Well, here's the thing...when I used to post on the other forum, there were threads about rear diffs leaking. Something about bad seals from the factory and a TSB and warranty replacements. BUT, I did the GMVIS report from TallGuy and he gave me a "laundry list" of repairs done to mine. One of which was the diff replacement. Well, I did a search and turns out some of the folks there had replacement diffs that were leaking, BUT, the leak was coming out of a vent hole on the top of the diff. I looked under mine and saw the fluid was indeed coming from the top of the diff. Or is this all B.S.?

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    Hell I have replaced my seals a couple of times. 1 hour job...no big deal at all....but yes under the right circumstances you can throw some fluid out the vent hole....

  11. #31
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    I'm going to place an order with amsoil oil, trans and rear gear fluid. How much fluid does the rear end hold (oem 3.23 a4 car)? I'm thinking three quarts should do it, but not sure. Thanks

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    Impulse Blue
    2004 GTO

    I've been running RP in the rear of the goat for a couple of years. Also have RP in the trans. Tried it in the engine and didn't like it at all. Running Penzoil Platnum for the last year or so in there and like it, previous was the old Mobil 1 that I had stockpiled.

    Anyway, I'm thinking of changing to Amsoil in both the trans and rear. Should I use something to flush all the RP out of both then go to Amsoil? Or just switching is all that is needed?

    I also have never used FM in the rear of any car I've had. Always used Mobil 1 until I got the goat and then tried RP. Seems people just can't it thru their heads that you don't need FM. Wonder why all those one wheeled burnouts come from....
    Rob
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    We almost Always use this from Amsoil with clutch type rearends.


    Then in the all out race cars we have usually ran the Moroso Climbing Gear fluid or Red Lines.

    Sarge have you ever done any testing with the Moroso stuff?
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

  14. #34
    Smiles for 9.5 Years cammed goat's Avatar
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    Quote Originally Posted by LS2Tuner View Post
    We almost Always use this from Amsoil with clutch type rearends.
    Click for full size

    Then in the all out race cars we have usually ran the Moroso Climbing Gear fluid or Red Lines.

    Sarge have you ever done any testing with the Moroso stuff?
    We have a bottle of that stuff layin around at work. I read the bottle. Will be going in in a few months.

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    Quote Originally Posted by Lutzfire24 View Post
    I'm going to place an order with amsoil oil, trans and rear gear fluid. How much fluid does the rear end hold (oem 3.23 a4 car)? I'm thinking three quarts should do it, but not sure. Thanks
    3 pints

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    Quote Originally Posted by Rob View Post
    I've been running RP in the rear of the goat for a couple of years. Also have RP in the trans. Tried it in the engine and didn't like it at all. Running Penzoil Platnum for the last year or so in there and like it, previous was the old Mobil 1 that I had stockpiled.

    Anyway, I'm thinking of changing to Amsoil in both the trans and rear. Should I use something to flush all the RP out of both then go to Amsoil? Or just switching is all that is needed?

    I also have never used FM in the rear of any car I've had. Always used Mobil 1 until I got the goat and then tried RP. Seems people just can't it thru their heads that you don't need FM. Wonder why all those one wheeled burnouts come from....
    Heat it up (drive it) and drain it.....With Amsoil you will not need any FM.

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    Quote Originally Posted by LS2Tuner View Post
    We almost Always use this from Amsoil with clutch type rearends.
    Click for full size

    Then in the all out race cars we have usually ran the Moroso Climbing Gear fluid or Red Lines.

    Sarge have you ever done any testing with the Moroso stuff?
    Nope.....

  18. #38
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    Quote Originally Posted by Sarge View Post
    Heat it up (drive it) and drain it.....With Amsoil you will not need any FM.
    So I don't need friction modifier for the SEVERE GEAR? This IS good news.

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    Nope

  20. #40
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    So I'm about to change the fluid in my 10-bolt. Anyone see any issues with running Redline 75W90 limited slip? Any reason to add anything to it? What's everyone's fluid of choice for a stock M6? Thanks

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