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P0741 on 5r55e after fluid filter change

Discussion in 'Transmissions & Transfer Cases' started by mfitz725, July 17, 2017.

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    1. mfitz725

      mfitz725 Elite Explorer

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      I was having no problems with the transmission but thought it time for a fluid/filter change at 160k. Now I'm getting a flashing o/d light and a p0741 code. I've read thru a number of posts and still am not certain how to approach this. Is it possible I damaged the TCC solenoid? I had a devil of a time getting the pan off and on due to it being jammed right up to the cat. Should I attempt to replace that solenoid (and the EPC for good measure). I understand the can be replaced without removing the valve body. Anyone have any ideas? I just can't buy its a coincidence that the TC went out because of a fluid change. This has been discussed a little on another thread I had about the difficulty of getting to the pan. I'm hoping posting here will bring more focused help on the problem. Someone posted a set of instructions for electrical testing but they sort of ran over my head, sorry.
       
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    3. JK080

      JK080 Transmission Moderator Staff Member Moderator Elite Explorer

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      The P0741 code will set if the converter wont engage, the most common failure for this code is the TCC solenoid, and can be replaced without removing the valve body. If this does not fix the code the other reasons include the valve body itself or pump and or converter issues.

      I would replace the solenoid first and maybe you will be able to tell if it was damaged while installing the pan, the EPC can also be replaced at this time without removing the valve body.
       
    4. mfitz725

      mfitz725 Elite Explorer

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      I read somewhere on the forum that a new solenoid bracket should be included also. Do you know what that is about?
       
    5. JK080

      JK080 Transmission Moderator Staff Member Moderator Elite Explorer

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      Sometimes the bracket that holds the solenoids in the valve body will break and allow the solenoid to move away from its bore, I have only see it a few times but it does happen.
       
    6. mfitz725

      mfitz725 Elite Explorer

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      Are these brackets available or are we talking about a trip to the Pull-A-Part yard. I've seen the solenoids for sale but not the brackets. Also are these solenoids going to be the same for any 5r55e or are they particular to 2wd and 4wd as I have a 4wd.
       
      Last edited: July 17, 2017
    7. JK080

      JK080 Transmission Moderator Staff Member Moderator Elite Explorer

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      I had always found one with the spare parts we have for this unit, but this should be what your looking for.

      5r55e Bracket.JPG
       
    8. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      Also check your wiring harness for missing insulation and would definitely recommend replacing the epc when your in there they usually go bad first and can cause all sorts of problems you can test all of your solenoid s with a multi meter (google the resistance specs or get a astg manual you can downlOad it for free 5r55e)but that is not a guarantee they could still be bad mechanically if you find the harness needs replacement I'd also recommend updating your separator plate gasket also just for kicks try resetting the pcm because Iv had tcc lockup issues before then even after a complete rebuild,shift kit, solenoids, and new torque converter it came back until I cleared the pcm, pcm might have to relearn sometimes they get stubborn.
       
    9. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      And go to the dealer or buy from a popular reputable online transmission parts supplier I got screwed on eBay buying "remanufactured" solenoid s at least two of them were completely shot
       
    10. mfitz725

      mfitz725 Elite Explorer

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      I did reset the pcm, that didn't help unless you think it might take more than one try.

      I had planned on buying only solenoids listed as new. That reman stuff scares me on these parts for some reason. I'm also considering taking it to someone to have this done as I don't have a place of my own to work and hate tying up someone else's garage for the time it would take me to do this. I know it should only be a couple of hours but it took me a day and a half to get the pan off and back on laying on my back with it so tight with the cat and everything.
       
      Last edited: July 30, 2017
    11. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      And astg manual is a rebuild manual for your transmission and also contains all the information you need to troubleshoot and test the transmission components you can download it for free just google it I'd want to bet you probably disturbed the solenoid or the wiring harness when you replaced the filter when they get old they get brittle and wiring falls apart I would advise to take it in somewhere that offers a warranty on there work and knows there stuff if you got the money because you can screw up the gaskets on the valve body when you remove it or reinstall it plus it has to be torqued to spec in sequence (astg manual has the instructions ) could end up being a real headache if you don't have the patience and the right tools and a clean garage.Iv wasted countless quarts of atf dropping the pan over and over before I finally got it right (dang eBay junk!)
       
    12. mfitz725

      mfitz725 Elite Explorer

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      I was under the impression that the solenoids could be replaced without removing the valve body, at least according to a post I read here on the forum. Is that incorrect?
       
    13. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      But iirc I don't think you have to drop the valve body to replace the wiring harness you can also test the harness point to point on the pins of the connector but it was easier for me to just spend the $50 extra during my rebuild since mine was on pretty bad shape upon close inspection anyway you also replace the fliud temp sensor with the new harness because it's built into it
       
    14. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      No You don't have to replace the valve body to replace the solenoids
       

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    15. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      No You don't have to drop the valve body to replace the solenoids
       
    16. mfitz725

      mfitz725 Elite Explorer

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      Not replace, I'm asking about just dropping it. I am sure I read the solenoids can be replaced without dropping the vb.

      Nevermind, you answered before I saw it, thanks. There was screw loose from thr vb in the pan when I took it off. I put it back and torqued them all.
       
    17. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      I was babbling on about the wiring harness lol the solenoid change is easy just get quality parts be careful not to damge the o -rings lube them with atf upon installation make sure there seated all the way in and be very clean and meticulous also be sure to check the wiring and connectors.
       
    18. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      I definitely recommend down loading that manual before you do anything you'll learn a lot about your transmission.
       
    19. mfitz725

      mfitz725 Elite Explorer

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      Sent
      I appreciate the info. The shop I'm going to ask to do this has a sterling reputation. I just hope I can get them to do a job this small.
       
    20. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      Google 5r55e ATSG sorry I got it wrong above I said astg
       
    21. mfitz725

      mfitz725 Elite Explorer

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      Already downloaded
       
    22. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      O I'm sure they will and that's the best option for you really for hassle free repair I'm forced to learn and do everything myself because money is tight but I'd still download the manual and read through it it's nice to know a lot about your ride for future problems, peace of mind, and also for the mechanics that might try to pull one over you because they think you don't know squat
       
    23. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      Great ! Hope everything works out
       
    24. mfitz725

      mfitz725 Elite Explorer

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      Yea, a little info can keep a lot of wool out of your eyes. Money is tight here too, but this is a priority since I'm gonna have to drive this thing for a while. Like I said if I had someplace of my own to work it could make a huge difference. I really miss my 94 XLT. Lol
       
    25. bigred4x4

      bigred4x4 Off-road enthusiast Elite Explorer

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      Yea the first gens were more simple a4ld only has two solenoid s and I like the ttb front axle and the 1354 t case, but that 5r55e though a little more complicated is a stronger transmission I think that's the biggest down fall of the first gens is the a4ld. Our Bronco ll goes through flex plates like oil changes.
       
    26. mfitz725

      mfitz725 Elite Explorer

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      I Never had a moment of trouble with the transmission in the first Gen. It all ended when I couldn't get it to pass emissions. I actually shed a few tears when it drove away after being sold as I drove it for 20 years.
       

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