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93 ZJ Transmission Fluid Change

Discussion in 'Grand Cherokee' started by TinyInkognegroT, Oct 9, 2019.

  1. Oct 9, 2019 at 11:59 AM
    #1
    TinyInkognegroT

    #1
    TinyInkognegroT [OP] Well-Known Member

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    This weekend I want to change the filter on my transmission and I also want to change the fluid type from what I currently have in it. Currently I have Dex Merc and I want to change it to ATF 4. Will I need to drain all the fluid out and replace it with ATF 4, torque converter and transmission? Or would I only need to do a couple to a few fluid swaps by draining it from the pan and eventually all the Dex Merc will flush out? Or is it even good to have a mixture of the two at once?
     
    TinyInkognegroT, Oct 9, 2019
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  2. Oct 9, 2019 at 1:02 PM
    #2
    aggrex

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    aggrex Well-Known Member

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    Draining the pan only removes a certain amount of old fluid. A few more flushes would be needed to remove more old diluted fluid.
     
    aggrex, Oct 9, 2019
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    JKBob 25 and TinyInkognegroT[OP] like this.
  3. Oct 9, 2019 at 1:16 PM
    #3
    TinyInkognegroT

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    TinyInkognegroT [OP] Well-Known Member

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    What about having a mixture of the two if I did that? Is it ok for my transmission ? If not, how would I flush out all of it?
     
    TinyInkognegroT, Oct 9, 2019
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  4. Oct 9, 2019 at 3:51 PM
    #4
    aggrex

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    aggrex Well-Known Member

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    Short of trans disassembly you won't be getting it all out. I think a few drain>fill>run cycles should be sufficient.
     
    aggrex, Oct 9, 2019
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  5. Oct 9, 2019 at 6:47 PM
    #5
    TinyInkognegroT

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    TinyInkognegroT [OP] Well-Known Member

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    Sounds sufficient to me...cftu because tranny disassembly is not what Im into right now... Someday but not right now.
     
    TinyInkognegroT, Oct 9, 2019
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  6. Oct 11, 2019 at 4:17 AM
    #6
    TinyInkognegroT

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    TinyInkognegroT [OP] Well-Known Member

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    How many quarts are required for the drain from the pan?
     
    TinyInkognegroT, Oct 11, 2019
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  7. Oct 11, 2019 at 8:18 PM
    #7
    JKBob 25

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    JKBob 25 Well-Known Member

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    Dropping the pain....with filter change. 6 to 8 quarts. Not including the transfer case. Which is bout 2.2 quarts.
    Just be prepared. If you drop the pan. Your gonna need a fairly large pan to catch fluid.
     
    JKBob 25, Oct 11, 2019
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