Idiot p.o put 90w oil in trans | Ford Escort Owners Association (FEOA)
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Idiot p.o put 90w oil in trans

Discussion in 'Drivetrains' started by garyd, Mar 18, 2020.

  1. garyd

    garyd FEOA Member

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    It's a 93 1.9 5 speed.
    Would this cause any damage to trans
  2. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    Unlikely. Just drain it and replace with ATF.
    I had to add fluid to my car on a road trip last summer, and the parts store listing specified gear oil.
    However, I knew it should be ATF and bought that instead.

    Many years ago I checked the transmission in a new to me 1963 Valiant and found ATF in it. I also thought some knucklehead screwed up, but it turned out that ATF was the correct lube in that three speed, non-synchro first gear transmission.
    I took it apart later just because that is what I did with everything I had when I was young, and found it was made pretty much exactly like all the other three speeds that used gear oil.

    So I conclude that transmissions are pretty forgiving about what lube is in them.
    Pizzaman5000 likes this.
  3. garyd

    garyd FEOA Member

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    Ok good.
    I was worried.
    I did drain it.
    Drain plug was really tight but it came out with a breakerbar
    zzyzzx and denisond3 like this.
  4. garyd

    garyd FEOA Member

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    Got my new speed sensor. I found if you sand the part that slides in the case down a bit and put antisieze on it the come right out
    denisond3 and zzyzzx like this.
  5. zzyzzx

    zzyzzx FEOA Member

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    Let us know if it works any different.
  6. garyd

    garyd FEOA Member

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    Trans seems to work good but now the power steering pump is bad
  7. xCroix

    xCroix "I used to have one of those!"

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    I know it's not an escort, but my '88 Camry uses Dexron III in it's 5spd trans.
  8. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    Do you need a spare?

    There's one near me, cheap:

    $40 · 1987 Toyota Camry 5 speed transmission
    Report Ad
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  9. xCroix

    xCroix "I used to have one of those!"

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    That's a good deal! But it's already been swapped with an '86 Celica transmission (also Dexron III) that's doing fairly well
  10. marclar

    marclar Administrator Staff Member

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    there are are a hundred thoughts on this topic... the atf flows better and doesn't go acidic as easily as gear oil in this application..
  11. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    The ATF will have less drag on the moving parts, so will give minutely better mileage, which might be of interest to the manufacturer.
  12. novanutcase

    novanutcase FEOA Member

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    I always use Mercon in my Ford Trannys. Haven't had a problem yet.

    John
  13. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    I figure since I ran my transmission dry, filling it up with anything close to the designated fluid will make it a hundred times better.

    Happily my transmission has been fine after last summer's debacle when I ran it out of fluid to the point of it popping out of gear when driving.

    A couple years ago it started to pump its lube out the speedometer head, so I was in no hurry to top it up.

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