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  1. #1

    Default What's the best fluid for my 03 Allison ??

    Hi all, Can I get your opinion and ideas on what is the BEST, not least expensive, fluid I should use for a filter/fluid service. I can't seem to find a solid answer to wheather to use Dex III , Dex VI or Transynd in my 03 Allison. I have got a lot of conflicting answers to this especially from GM dealers. thanks

  2. #2

    Default

    I stand with royal purple
    i think its amazing, having use it in both manual and automatic transmissions.
    runs cooler, shifts smoother, and overall- keeps the trans cleaner than whatever the manufacture calls for
    so yeah, i say invest in that stuff.
    my jeep, my chevy, and my friend's mustang, all love it

  3. #3
    Jr. Engineer 4x4squared's Avatar
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    Default

    Quote Originally Posted by K15 Blazer Guy View Post
    I stand with royal purple
    i think its amazing, having use it in both manual and automatic transmissions.
    runs cooler, shifts smoother, and overall- keeps the trans cleaner than whatever the manufacture calls for
    so yeah, i say invest in that stuff.
    my jeep, my chevy, and my friend's mustang, all love it
    mine does the same thing with royal purple as it does with valvoline lol its really just whatever you have good/bad experience with. personally im not hooked on any sort of oil or tranny fluids but i know lots guys that swear up and down that *insert brand name here* works better than all the rest. i have a grandpa that uses nothing but castrol and another grandpa that uses nothing but valvoline. both have had vehicles last over 300k miles without any major problems. find the prettiest bottle or the one thats on sale if you ask me.



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  4. #4

    Default

    It gets a little more complicated than that when you are 2500 miles away from home pulling a 13K pound 5th wheel and you need a tranny overhaul at the tune of $4500. Thanks for your help so I think I will use what all the Allison dealers recomend.
    Have a great day and thanks again.

  5. #5

    Default

    daaaaaaaaaaamn thats a lotta gas and groceries they just robed you of.......
    they had better have taged on a kick ass warranty for that price.

    and if they did, then totally get what they tell you to get for oil... preserve the warranty

  6. #6

    Default

    Sorry, I didn't mean I had an overhaul I just ment I didn't want one.

  7. #7

    Default

    oh thank god
    lol

    well either way with regular changes and attention to fluid level and quality, it should be fine no matter what.

    i still say royal P though. especially for towing, because it runs cooler. heat kills auto transmissions

  8. #8
    Jr. Engineer 4x4squared's Avatar
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    Quote Originally Posted by Bluewater View Post
    It gets a little more complicated than that when you are 2500 miles away from home pulling a 13K pound 5th wheel and you need a tranny overhaul at the tune of $4500. Thanks for your help so I think I will use what all the Allison dealers recomend.
    Have a great day and thanks again.
    just out of curiosity, why ask when youre going to use whats recommended anyway?

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