Thread: Transmission Rebuild: CAT Fluid/Dex VI or Amsoil?

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  1. #1 Transmission Rebuild: CAT Fluid/Dex VI or Amsoil? 
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    I'm hearing and reading a lot of things and wanted to see what you guys think as well. I'm rebuilding my tranny and wonder what will be recommended for my 04 GTP. I know Dex VI is the route but I was curious about

    The Dex VI mixed with CAT fluid? And what's the ratio?

    And or Amsoil?

    Any thoughts...

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  2. #2 Re: Transmission Rebuild: CAT Fluid/Dex VI or Amsoil? 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    If this was 2004 it would still be DEX 3 on the dipstick as I though it was 2005-2006 that switched to the newest DEX 6 as the older fluid was phased out (superseded).

    For as simple as these transmissions are and for what the fluid has to do I'd toss that cheap dex 3 right back in it without a single care in the world.

    Putting in DEX 6 or using amsoils or cat fluid isn't going to do some voodoo magic and make it run better.

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  4. #3 Re: Transmission Rebuild: CAT Fluid/Dex VI or Amsoil? 
    Solving problems BrandonHall10's Avatar
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    Quote Originally Posted by Fivefingerdeathpunch View Post
    For as simple as these transmissions are and for what the fluid has to do I'd toss that cheap dex 3 right back in it without a single care in the world.
    Agreed. For a daily driver, the type of fluid is less important the the sustained operating temperature. Take the money you save and put it towards a cooler.
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  6. #4 Re: Transmission Rebuild: CAT Fluid/Dex VI or Amsoil? 
    I break stuff selliott's Avatar
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    I run amsoil in all my vehicles, trans, oil etc.
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  8. #5 Re: Transmission Rebuild: CAT Fluid/Dex VI or Amsoil? 
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    Haha true for the voodoo part. I've upgraded input shaft/chains and installed a few things in the Valve body from Sonnax and also added 3rd clutch piston from Sonnax. Trying to get what's best for what I can afford now. This tranny cant fail me anymore haha. If it does, it'll be my mistake haha
    Quote Originally Posted by Fivefingerdeathpunch View Post
    If this was 2004 it would still be DEX 3 on the dipstick as I though it was 2005-2006 that switched to the newest DEX 6 as the older fluid was phased out (superseded).

    For as simple as these transmissions are and for what the fluid has to do I'd toss that cheap dex 3 right back in it without a single care in the world.

    Putting in DEX 6 or using amsoils or cat fluid isn't going to do some voodoo magic and make it run better.
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  9. #6 Re: Transmission Rebuild: CAT Fluid/Dex VI or Amsoil? 
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    Quote Originally Posted by BrandonHall10 View Post
    Agreed. For a daily driver, the type of fluid is less important the the sustained operating temperature. Take the money you save and put it towards a cooler.
    Yea, I have a TruCool Max ready to be installed and if I dont have the balls to modify it I'll still install a Trans Cooler I got from a Ford Explorer.. But this is what I've done so far..

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  10. #7 Re: Transmission Rebuild: CAT Fluid/Dex VI or Amsoil? 
    Turbo is the way to go. BillBoost37's Avatar
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    Search on my name and the cat fluid. I forget how much Dave at TEP said to add. It might have been half or so.. but don't do it w/o confirming it.

    The reason for doing the cat fluid was because it sticks to components better and keeps them lubed better under stress.
    I drink..so consider that when reading my posts.

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