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Changing diff fluid..

This is a discussion on Changing diff fluid.. within the GTO forums, part of the Vehicle Specific category; Anyone have a how-to on this? Sorry if it seems like a newb question but I searched and found some ...

  1. #1
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    Torrid Red
    04 GTO m6

    Question Changing diff fluid..

    Anyone have a how-to on this? Sorry if it seems like a newb question but I searched and found some threads on "what fluid to use" but not actually HOW to do it.......it's prob ridiculously easy for most of you but this is my first RWD car and I haven't done one before.

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    The f**king Eagles?! JB454's Avatar
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    both red
    1998 Z28 - 1991 Z28

    Quote Originally Posted by ls1fan74 View Post
    Anyone have a how-to on this? Sorry if it seems like a newb question but I searched and found some threads on "what fluid to use" but not actually HOW to do it.......it's prob ridiculously easy for most of you but this is my first RWD car and I haven't done one before.
    Make sure you use the additive for limited slip differentials! Besides that, use a good synt fluid recomended for your ride.

  3. #3
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    I changed over to AMSoil 75-140 Severe Gear and was good but a few days later my diff developed a low-speed chatter. I bought a tube of CRC True Gear diff additive and the chatter is gone now. Feels alot better.

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    Torrid Red
    04 GTO m6

    30 mm? day-um thats a big one....ok so that's it? 15 mm open and let it drain out, then plug it back up and open the 30 mm, add 3 quarts of 75w-90? I'm upstate ny...its pretty warm right now, I'm stock and drive fairly agressive not too bad though. Should I go heavier? (80w140?)

  5. #5

    Post Chatter

    75W-110, or 75W-140 is a better rout to go as some have differential chatter issues with the 75W-90; a little too thin in some applications. Also, AMSOIL Severe Gear already has limited slip additives in it, but some do end up needing more. AMSOIL Slip Lockô Differential Additive is compatible with the other additives in Severe Gear.

    CompSyn

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    Grand Imperial Wizard Sarge's Avatar
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    Let me find a pic of my diff and I'll do a quick write up with some arrows for you....

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    Grand Imperial Wizard Sarge's Avatar
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    Hells bells...Ol RedGTO beat me to it....
    http://www.redgto.com/KB/article.asp...7&cNode=5U4I3A

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    Torrid Red
    04 GTO m6

    that.is.awesome. thanks a bunch thats a huge help..i may do the trans fluid now too

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    Torrid Red
    04 GTO m6

    can i get this friction modifier from the dealer?

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    James Bond Spikito's Avatar
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    2001 3.8 Black - sold
    2000 SS Black M6

    I was gonna help but your rear end is way different than mine. I have one plug, on the side of the housing, above the axle. Only way to drain is to either pump it out, or pop the diff cover.

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    Torrid Red
    04 GTO m6

    No prob....I think I'm gonna go with mobil 1 from the auto parts store and that trans-x friction modifier....I'll leave it in for a bit, if i start to hear noise (theres none now...purely maintenance) I'll order some amsoil.

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    Member Texas Jack's Avatar
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    Cyclone Grey
    2006 GTO M6

    ls1, Got mine at the dealer ship it is P# 43161, but make sure the bottle inside the wraper has 7089 on it. I used RP and really didn't have to use any but just for insurance used 1/2 oz. Just to let you know it smells like hell and use rubber gloves. Jack

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    Grand Imperial Wizard Sarge's Avatar
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    No shit...I think we should drop about 4 oz of that shit on them towel head sons bitches...they quit right there and join the Catholic Church....man that stuff STINKS!

  14. #14
    Member Texas Jack's Avatar
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    Cyclone Grey
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    It's freaking nasty shit!!!

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    Torrid Red
    04 GTO m6

    umm is there any downside to too MUCH friction modifier? if there is such a thing?

  16. #16
    Grand Imperial Wizard Sarge's Avatar
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    The modifier makes your lube less slick so your diff will engage in lockup (posi traction) so you are diluting your lubes ability to be slick....

  17. #17
    Veteran Hi-Po's Avatar
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    Black
    1999 TA WS.6

    Dealership prices on the lube is way expensive. Evn the parts guy told me to go buy it from Chinazone,

    And yes, it stinks badly. I honestly wear gloves anymore. Hate that smell.

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    Torrid Red
    04 GTO m6

    yea i ended up spilling some on my hands as well as the tarp i'd put down to work. then i rolled onto it, so it got my shirt too. I put about i'd say 4-5 oz of trans-x in before I filled the diff..too much? should I change it again?

  19. #19
    Member JAX04's Avatar
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    PBM 366ci TC78 E85
    2004 Pontiac GTO PBM A4

    i used 75w 140 ROYAL PURPLE, it already had the friction modifier in it. and i used two quarts, gm said to fill it to the bottom of the fill whole. lol you cant fill it more then that. lol. i think my diff is alot smoother now with the RP. nice stuff.

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    PEWTER
    2001 TRANS AM WS6

    RP you should just pee in your rear you will get the same effect

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