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best transmission fluid for '04 cobra?

Discussion in 'Driveline' started by pgrimlock, Dec 23, 2007.

  1. pgrimlock

    pgrimlock HP Addict Established Member

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    Howdy all, I'm new. Just wanted some expert input on which tranny fluid is best for our car and why you think so. Thanks ahead!
     
  2. Tom's_03SVT

    Tom's_03SVT Well-Known Member Established Member

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    Penzoil Synchomesh....
     
  3. 94-98 Trans Am

    94-98 Trans Am New Member Established Member

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    yep, thats whats I've always run in a t56. Plus its easy to find at most parts stores.
     
  4. Tractionless1

    Tractionless1 Ur Gator Bait!! Established Member

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    Synchromesh has been linked to damaging a specific part of our transmissions, can't remember which but I have seen it listed here and Modfords. I use Redline D4 as recommended by those who roadrace Cobra's.
     
  5. Tom's_03SVT

    Tom's_03SVT Well-Known Member Established Member

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    GM has been using the T56 for 18-20 years with GM synchomesh fluid (made by penzoil). Can you provide a link to this failure info?
     
  6. JedWele

    JedWele aka "boostfiend" Established Member

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    I am planning on trying amsoil's atf , I heard only good things about it.
     
  7. pgrimlock

    pgrimlock HP Addict Established Member

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    Dec 23, 2007
    Location:
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    Someone recommended Royal Purple one time to me. Anyone ever had any experience with this brand? BTW, How many liters do i need to fill it?
     
  8. About2bite

    About2bite SVTNProgress Established Member

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    Interesting, i'm thinking about changing the trans fluid in mine when I put in my MGW. i have heard nothing but good things about Amsoil's products in general, it'd be nice to see what else is available that cobra owner's have had success with
     
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  9. 01cobravortech

    01cobravortech Banned

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    I had used Pennzoil Synchromesh (10k approximately) up until the early part of the winter. The tranny started shifting like crap and feeling real notchy as it got colder. It has shifted like a dream since switching the Castrol Dexron III ATF.
     
  10. skaarew04SVT

    skaarew04SVT Not quite fast enough Established Member

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    i use mobil 1 ATF, no issues here. royal purple is good stuff too
     
  11. Juruense

    Juruense Banned

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    I use Mobil1 ATF works great.
     
  12. oldmodman

    oldmodman Well-Known Member Established Member

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    Another vote for Mobil 1

    Put it in at 500 miles and replace it everytime I pull the tranny for any reason or try a new shifter.

    I was going to try Royal Purple but I had a couple of cases of Mobil 1 from a really cheap sale at Kragen so I kept on using it.
     
  13. 0mineralgrey3

    0mineralgrey3 Spooooooolllllll Established Member

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    Mobil 1 synthetic ATF
     
  14. 32vofFury

    32vofFury WHINE & DINE! Established Member

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    Amsoil Atf..........ftmfw!!!!!!!
     
  15. TheFleshRocket

    TheFleshRocket Likes to drive sideways. Established Member

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    ++

    Mine is about as close to buttery smooth as you can get from a T56.
     
  16. 03yllwguy

    03yllwguy Daily driven since 2003 Established Member

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    I switched to it and immediately noticed a degrade in shifting cold or hot. I switched back to stock fluid and the shifting was smoother despite temperature. I wouldn't waste the $$$.
    I'm a huge fan of their motor oils and have run them from day one, just not the ATF.
     
  17. tonypipes

    tonypipes New Member Established Member

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    Royal Purple Syncromax has been good to me.
     
  18. mlab

    mlab New Member Established Member

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    Sep 22, 2006
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    Houston
    Mobil 1 Syn. recommended by t56rebuilds.com. Works great.
     
  19. LS1-Larry

    LS1-Larry New Member Established Member

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    Nov 10, 2006
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    Richmond, Tx
    I just had my tranny out............and added Royal Purple ATF..........so far so good!
    John
     
  20. Nutty 5.0

    Nutty 5.0 Well-Known Member Established Member

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    Personally have good luck with Amsoil ATF...
     

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