Convertible pump fluid?

Early C Bodies - The Slab Side Years

  1. TerryM

    TerryM Active Member

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    Hi, just wondering what fluid ppl use in their convertible top pumps? Also does anyone know the correct procedure to bleed the system? Everything is brand new. Cheers Terry

    C000892E-D244-4F81-8342-027ADF4F7BB9.jpeg
     
  2. bluefury361

    bluefury361 Old Man with a Hat

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    Older units used brake fluid. That changed to trans fluid some time in the 60's. Best to consult your FSM.
    The system is bled by cycling the top down and up until it works as it should.
     
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  3. Pete Kaczmarski

    Pete Kaczmarski Senior Member

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    I use ATF on my '62 300 convertible. Easier to clean up and won't eat your paint up. Open the fill screw slowly and listen for air escaping.
     
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  4. rkrochen

    rkrochen Well-Known Member

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    Mine has brake fluid in it. Work the top up and down and it should clear the air out, keep checking the level. As some have said newer cars used trans fluid. Check to see if there is any fluid in yours and use what’s in it now don’t mix them.
     
  5. Evan Jansen

    Evan Jansen New Member FCBO Gold Member

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    Good Morning

    My 66 uses transmission fluid. There are kits for refilling available that make it less messy. But I can also find and scan the instructions to you if you wish.
     
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  6. Fury440

    Fury440 At my age everything's a good idea

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    G'day!
    I've used power steering fluid and transmission fluid in different convertibles and both work just fine. I steer away from brake fluid because the roof hydraulics seem to be prone to leaks and brake fluid is bad news on painted floor pans and even worse under rugs.

    To fill and bleed the system, remove the fill plug found on the pump reservoir an fill with the oil you decide to use. Fill to the bottom of the threads, I use a turkey baster. make a tin foil tray to sit under the fill hole to catch drips. replace the plug but leave it loose enough to pass trapped air. Cycle the top up and down. Check the fluid level against the threads and if required top it up and repeat the top cycle. You get the idea!

    Your car is amazing!!
     
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  7. rags

    rags Senior Member

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    dextron 2 in my '69 newport. NO brake fluid.
     
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  8. CBODY67

    CBODY67 Old Man with a Hat

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    IF the seals are new, then check with the seal provider to see what fluids they might be compatible with. Then go from there. On an un-rebuilt factory system, then the FSM recommendations would be operative. Brake fluid was OEM with many brands up into the later 1960s, as brake fluid was "everywhere" as atf was not, in the earlier years.

    The old Dexron II fluid is long gone, replaced by the current Dex VI, which is semi-syn. Dexron IV fluid is still around, as "multi-make" with GM vehicles being listed on the bottle as the main application. Other "multi-make" atf is related to import brands, fwiw. Check the ACDelco chemical/fluid products, too.

    Just some thoughts,
    CBODY67
     
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  9. TerryM

    TerryM Active Member

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    The whole system is brand new. I’ll try and find the supplier. Thanks for your reply:)
     
  10. TerryM

    TerryM Active Member

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    Thanks mate :)
     
  11. TerryM

    TerryM Active Member

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    Thanks mate :)
     
  12. TerryM

    TerryM Active Member

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    Thanks mate. Mine is all brand new and never filled. Although I did check an old spare set I had which looked like atf fluid
     
  13. TerryM

    TerryM Active Member

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    Thanks mate that would be awesome :)
     
  14. TerryM

    TerryM Active Member

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    Thanks mate:)
     
  15. TerryM

    TerryM Active Member

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    Thanks mate :)
     
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  16. TerryM

    TerryM Active Member

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  17. rkrochen

    rkrochen Well-Known Member

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    You should be ok with atf, it’s a low pressure hydraulic system and as long as you don’t mix it you should be fine. It wouldn’t hurt to double check with the manufacturer of the seals and pump but I have a feeling it would be ok.
    I used brake fluid because there was a mix of fluids in there, probably atf and brake fluid so it didn’t work properly. I checked the manual and it said brake fluid so I flushed it out and went with the brake fluid. It’s been fine ever since.
     
  18. detmatt

    detmatt Old Man with a Hat FCBO Gold Member

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    I was told by I can’t remember who but somebody I trusted to use type F in my Challenger so that’s been in there for years.
     
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  19. notsosan

    notsosan New Member

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    ATF in my 66
     
  20. bluefury361

    bluefury361 Old Man with a Hat

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    I found this under the rear seat of my 67 convertible today.....
    top pump  fluid callout.JPG
     
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