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6MT throwout bearing and clutch system shenanigans

Discussion in 'Technical Chat' started by BillDaCat8, Dec 12, 2020.

  1. Feb 15, 2024 at 5:27 PM
    #621
    azzwethinkweiz

    azzwethinkweiz Well-Known Member

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    PXL_20240216_011846996~2.jpg

    So it starts lads...

    Finally had some free time, got the cats and shafts out, figured I'd take the whole thing out since I'm replacing my carrier bearing as well. Much more to do but I remember the last time the most tedious part was the cat hardware which decided to crap itself. This time no busted hardware, only a stud decided to come out.

    So hopefully the rest goes smoothly... Just gonna do small bits as I can.
     
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  2. Feb 16, 2024 at 6:26 AM
    #622
    azzwethinkweiz

    azzwethinkweiz Well-Known Member

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    I can't tell what that wire is but I assume your issue has something to do with the clutch switch. Does your truck start while holding in the clutch or do you have to use the button? I think the cruise control uses whatever that switch is to know when you've pushed in the clutch to disengage cruise... Unless it has its own switch.

    Next time I'm with my truck I'll have a look and see if I notice that wire you circled.
     
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  3. Feb 16, 2024 at 6:59 AM
    #623
    Tfs94gt

    Tfs94gt Well-Known Member

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    if I depress clutch all the way yes it will start and the clutch cancel button works as well. But for the life of me I don’t see anywhere this would plug in.
     
  4. Feb 16, 2024 at 7:44 AM
    #624
    DesertRatliff

    DesertRatliff Well-Known Member

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    If it's just a single green wire with yellow stripe, I'm certain it's the e-brake indicator switch wire. Toyota wired in two of these plugs and, depending on transmission,one is on the left side for the foot controlled e-brake for auto trannys and the other is under the right side of the dash for the hand operated e-brake of the manual trannys. Since there's two plugs for each configuration, no matter which transmission you have, one of them is unplugged. Since you're 6 speed manual, yours is likely unplugged on the left.

    As for cruise control, does the indicator light come on at the dash when you push the cruise control button?
     
    Last edited: Feb 16, 2024
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  5. Feb 16, 2024 at 12:04 PM
    #625
    azzwethinkweiz

    azzwethinkweiz Well-Known Member

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    I wonder if the transmission ties into the cruise control system somehow even though it's a manual and not auto? Never really given it much thought but I guess it would only make sense...

    That being said, there is one connector iirc that plugs into a sensor on the transmission I think it was on the passenger side kind of forward towards the top, next to the exhaust manifold flange. The rest of the connectors I think went to the transfer case. Might be worth looking to make sure all your wiring is plugged in on your transmission.

    EDIT: I just remembered there is also a connector that plugs in also on the passenger side near the prop shaft flange near the rear of the transmission.

    Screenshot_20240216-131534~2.png
    Screenshot_20240216-131455~2.png
     
    Last edited: Feb 16, 2024
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  6. Feb 16, 2024 at 2:23 PM
    #626
    Tfs94gt

    Tfs94gt Well-Known Member

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    yes it is green with yellow stripe so you’re correct. Yes the light does come on the dash. As of today it’s got the trac off light with the check engine light one. Only code is for oxygen sensor out of range. Frustrated with this one.
     
  7. Feb 16, 2024 at 2:37 PM
    #627
    Tfs94gt

    Tfs94gt Well-Known Member

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    thanks for the tips. I triple checked all the external connections and they’re all clicked in and tight.
     
  8. Feb 18, 2024 at 12:22 AM
    #628
    azzwethinkweiz

    azzwethinkweiz Well-Known Member

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    I don't know how it is with Toyotas but I know on my Subaru it was the case that whenever it had any check engine light on, the cruise control light would turn on and off freely but you couldn't get cruise control to engage.

    I have also read that the "Trac off" light sometimes comes on with any other check engine light even if it's not related.

    Another silly thought but would it be possible you have the connectors for the O2 sensors swapped around? I was looking at my harness after getting my transmission out and even though they're different lengths it would be possible to mix them up. I'll have to double check but on mine I think the right side harness has red tape by it and the left side has blue.
     
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  9. Feb 21, 2024 at 8:32 AM
    #629
    BillDaCat8

    BillDaCat8 [OP] Well-Known Member

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    Minor edit to post#2 clarifying master cyl hardware specifics.
     
  10. Feb 21, 2024 at 8:42 AM
    #630
    BillDaCat8

    BillDaCat8 [OP] Well-Known Member

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    Make sure that your pedal returns far enough up that it is depressing the cruise cancel switch that is way up at the top of the pedal bracket. There's a bit of adjustability there. Though, it's not much fun to access. If this switch isn't pressed, the cruise control will turn on like normal, but will not set because the computer thinks the clutch is being pressed.

    upload_2024-2-21_9-40-47.png
     
    Last edited: Feb 21, 2024
  11. Feb 22, 2024 at 1:36 PM
    #631
    Tfs94gt

    Tfs94gt Well-Known Member

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    thank you for the tip. It does appear to be adjusted properly and is completely depressed when pedal is released. I will adjust it out slightly and recheck. At this point it’s going to have to go back to the mechanic. I’m getting a repetetive code p0137 with check engine light and the trac light. I replaced the seuspect sensor with a factory one from from dealer, cleared codes and lights have returned. I think perhaps something is unplugged or going on with the harness above the transmission possibly.
    This white plug is part of a diagnostic system or brake controller plug I believe? As in, it’s supposed to be unplugged?

    IMG_5652.jpg
     
  12. Feb 22, 2024 at 3:38 PM
    #632
    BillDaCat8

    BillDaCat8 [OP] Well-Known Member

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    I suppose that it is possible that the harness was damaged when the tranny was removed or re-installed. An O2 code doesn't sound like anything to do with the clutch pedal related stuff. The rear O2 sensors are in fact plugged into the transmission harness. So, I'd start looking there.

    Pic is of the brake controller connector. If you're not using it, just zip-tie it up out of the way. It isn't connected to anything until you add a brake controller.
     
  13. Feb 22, 2024 at 5:50 PM
    #633
    Tfs94gt

    Tfs94gt Well-Known Member

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    I be checked everything that’s visible but I can’t see what exactly is going on with harness on top of the trans. I can tell the harness it isn’t in its original brackets in a couple places. I’ve got a call in to the shop that did it. I’d rather not take it all the way out there but I’m chasing my tail at this point.
    On a side note the system you developed works/feels great. Additionally I found an “elevator bolt” at the local hardware store that made the perfect clutch pedal stop.

    IMG_5647.jpg
     
  14. Feb 22, 2024 at 6:17 PM
    #634
    azzwethinkweiz

    azzwethinkweiz Well-Known Member

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    Its pretty easy (if you're not paying close attention) to mash the harness in between the block/ bellhousing and also the top of the transmission tunnel when installing the transmission. Its also potentially hazardous when removing the transmission as there are plenty of places for the harness to snag when lowering the transmission. To make matters worse you can pretty easily swap the left (blue tape) and right (red tape) o2 connectors with each other. I didn't read well enough to realize that it was a shop that did the work, I'd definitely just take it to them and have them sort it.
     
    Last edited: Feb 22, 2024
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  15. Feb 22, 2024 at 7:18 PM
    #635
    Tfs94gt

    Tfs94gt Well-Known Member

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    The red taped one is on the passenger side but it almost looks a little contorted. Thank you for all the assistance.

    IMG_5658.png
     
  16. Feb 23, 2024 at 8:39 AM
    #636
    BillDaCat8

    BillDaCat8 [OP] Well-Known Member

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    That's a fantastic find. I like it a lot. What size thread is it?
     
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  17. Feb 23, 2024 at 9:29 AM
    #637
    Tfs94gt

    Tfs94gt Well-Known Member

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    It’s 1/4-20, it fits perfectly
     
  18. Feb 23, 2024 at 12:37 PM
    #638
    BillDaCat8

    BillDaCat8 [OP] Well-Known Member

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    Any Item numbers or anything?
     
  19. Feb 23, 2024 at 12:40 PM
    #639
    BillDaCat8

    BillDaCat8 [OP] Well-Known Member

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    Cleaned up some of the parts ordering stuff in post#2 updated links and such.

    As more people are interested in this setup I'm learning that I need to be more clear up front. The whole thread originally was a "Train of thought" sort of thing. I'm working on it...
     
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  20. Feb 23, 2024 at 6:09 PM
    #640
    Tfs94gt

    Tfs94gt Well-Known Member

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