Dexron VI ATF Fluid Research

Discussion in 'transmission and Drive train' started by Indycars, Jul 3, 2018.

  1. Indycars

    Indycars Administrator Staff Member

    Since I'm going to change to a Dexron VI fluid from the Mercon V that I've been using, I had
    to do my research first.

    Ever wonder where the name Dexron came from, well ......


    I wanted to get the Dexron VI standard, but since it's $30 or more, I'm going to bypass that step.
    As near I can tell, to meet the standard the fluid with have to be at least a synthetic blend. Some
    products say they are Full Synthetic.

    You will also notice that many fluids will use in their name "Multi Vehicle", I believe this is a way
    to get around paying GM to licenses their products as Dexron VI. It usually means that the price
    will be less when the company does not have to pay for the license. See Mobil 1 image below.

    Mobil 1 MV Image.jpg

    You will notice that Mobil 1 Data Sheet says it works for all Dexron specs, except the VI version.

    According to Exxon Mobil, Mobil 1 Synthetic ATF is of the following quality level:

    Allison C-4

    General Motors Dexron IIIH

    General Motors Dexron IIIG

    General Motors Dexron IIE

    General Motors Dexron IID

    General Motors Dexron II

    General Motors Dexron

    Ford Mercon

    MAN 339 V1

    Volvo 97340

    Volvo 97341

    Below are the ATF fluids that I was able to get their data sheets for, including a John Deere Hy Gard
    hydraulic fluid that some people use because it's much cheaper to purchase. I was MOST INTERESTED
    in the parameter called "Flash Point", this may not be the perfect indication for oxidation of the ATF,
    but it's best that the companies publish. Another words, the higher the flash point, the higher temp the
    fluid can go before you get that BURNT smell.

    Also on my list was a Full Synthetic and Valvoline in my opinion was the best. It was a full synthetic and
    had a Flash Point above 400°F.

    I also got the best price for Valvoline on Summit when purchasing a case of 12, so I bought two cases
    at $7.17 per quart, some were over $12/qt.








  2. Indycars

    Indycars Administrator Staff Member

    You can download my Excel spreadsheet where I kept tabs on prices, synthetic, flash point and where to get them.

    Attached Files:

  3. T-Test

    T-Test Well-Known Member

    I have always been taught that any trans fluid will work as long as you keep the temperature down. Just don't mix and match---per/se' I personally think Synthetic stuff is all hype and a lot of money wasted.

    Think about it. Seals and fiber plates as well as bearings and thrust washers. No brand that I know will make them swell or be eaten by the fluid ---like brake fluid does to paint, seals/rubber parts. JMTCW

    I once used trans fluid in a V8 engine that was completely modified with roller/torrington bearings just to get it to turn 10000 to 12ooo RPM. Bearing/piston failure but not due to trans fluid.
  4. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Dextron VI was made for Granny Smooth shifts.

    Performance use dictates different.

    I have had really good results with Castrol Dex/ Mercon.
    My Trans oil temps stay 110-150 F.
    Grand Prix Turbo 400 & 1999 Tahoe 4L60E.

    Feedback from others Racers most important.

    Universal Tractor Hydraulic Fluid is Best .
    Used by many.
    John used it.
    Next time around I will use too.
    Strictly Attitude likes this.
  5. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Need to put a large Trans cooler somewhere.
    Front of T.
    Rear of T by the rear diff.

    Small middle underside not working.

    Twin Tube Heatsink style Moroso works for me.
    Better than any I have witnessed.

    Hayden 697 is affordable.
    Smaller than the Moroso.

    They make a single heatsink style too by Moroso.
  6. Indycars

    Indycars Administrator Staff Member

    Wow, that's very high rpm! Didn't the rods fail? Got any pics of the damaged bearings and such?
  7. T-Test

    T-Test Well-Known Member

    O YES and pistons and everything else.

    All that was done in 1982 and was put in a 1969 Chevelle and sadly I never documented much in those days.
    We (the owner and I) put 10 BIG BLOCKS together and installed in that car in one year. If it wouldn't turn 10,000 RPM he didn't want it.
    The last we built was a 462 that lasted a whole year of street/strip driving with a 4:11 rear end. Then he wrecked the car--not his fault--got married and saved his money for other things.

    Back in the 70'sand 80's he and I were used to making 2 to 3 grand a week at a garage and we ran the wreckers on weekends to make more than we did during the week.
    The older I got the less money I made.

    I had a '55 2 door HT with a 455 Olds engine with a Muncie 4 speed straight axle front end and 4:11 gears and had moved the rear axle 12" forward and re did the wheel wells so you wouldn't notice it unless you were beside another '55.

    We loved street racing!!
  8. Loves302Chevy

    Loves302Chevy "One test is worth a thousand expert opinions."

    Sounds like a fun time. Ah, the good old days.:cool:
  9. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Universal Hydraulic Fluid or Hytran has no friction modifiers for Smooth shifts.
    Detrimental in performance apllications smooth shifts.
    Means the clutches and bands are slipping momentarily.
    Gets worse with Hp and rpm.

    It comes down to trying what you want.
    Sucess is the transmission lives.
    Failure is it burnt up again or blew up.
  10. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Castrol Dex/ Mercon Dino grade ATF I like.
    Delivers Fast Firm shifts.
    Still blood cherry red in the 63 GP Th400 & 4L60E in the the Tahoe.
  11. Strictly Attitude

    Strictly Attitude solid fixture here in the forum

    Key is hytrans buy a 5 gallon pail change fluid more often. Proven fact ask any trans builder. More often changes will be better then better fluid. I originally was gonna run amsoil for all my fluids. Did my homework.
  12. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    btw do any of you gentlemen know how to check the trans fluid level on a
    2014 5.7 hemi chrysler 300c with the auto transmission my neighbor drives,
    I don,t see a trans dip stick?
  13. JohnHancock

    JohnHancock Well-Known Member

    Had a dodge mini van and trans dipstick had no markings. Found it hidden on drivers side right behind power steering pump. Just had a straight bar for a “handle” to twist and pull. It was black so you had to know it was there. Good luck. Mine was not a Hemi so may be different.
  14. T-Test

    T-Test Well-Known Member

    Owner's manual? Google?
  15. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    not my car, but thanks Ill look closer

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