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Five speed auto transmission pan material

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Ncskeeter, Mar 20, 2017.

  1. Mar 20, 2017 at 3:53 AM
    #1
    Ncskeeter

    Ncskeeter [OP] Well-Known Member

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    Does anyone know what material the 5 speed auto transmission pan and drain plug are made from?

    I've stripped the plug and/or pan and was wondering if there's any chance that the plug is made from a softer material. Obviously I'll look at both threads when I drain the pan, but I haven't got that far yet. I'm wondering what I'm in for.

    Be warned: this happened during my second drain and fill maintenance. As far as I know, no one has touched this bolt other than me and the person that installed it in the transmission at the factory. I don't remember having any issues the first time around. I torqued to the value in the service manual the first time (29 ftlb). In hindsight, this seems way too high and was probably when the damage was done. Fast forward to this weekend and the bolt threads in, but will not tighten past finger tight.

    I've been doing all of my own maintenance since I was 16 and have never had an issue like this. Going forward I will never torque this plug again. I will go by feel just like I do on the engine oil pan. I've never had an issue doing that.
     
    Last edited: Mar 20, 2017
  2. Mar 20, 2017 at 4:28 AM
    #2
    Jimmyh

    Jimmyh Well-Known Member

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    I'm not sure, but I think you have the torque value wrong. 29 ft lbs is a lot for a drain plug. I have never used a torque wrench on a drain plug. Very snug has always worked for me, after all it does have a gasket.
     
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  3. Mar 20, 2017 at 4:49 AM
    #3
    Ncskeeter

    Ncskeeter [OP] Well-Known Member

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    You're right. I meant to say 21 ftlb is in the book. Even that I think is a dry torque and is too much for after a drain and fill. I'll never torque a drain plug again. That was the first and last time. I did it because I don't regularly touch that bolt or check atf levels like engine oil.
     
  4. Mar 20, 2017 at 4:54 AM
    #4
    gearcruncher

    gearcruncher Well-Known Member

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  5. Mar 20, 2017 at 5:02 AM
    #5
    DaveInDenver

    DaveInDenver Not Actually in Denver

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  6. Mar 20, 2017 at 5:12 AM
    #6
    Ncskeeter

    Ncskeeter [OP] Well-Known Member

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    Think 15 ft lbs is the overflow plug. Drain plug isn't specified in the service manual linked above. The separate page with the torque table shows 21. I did the overflow plug by feel and it's fine.

    No I reused the crush washer like I always do. As long as it doesn't get turned around on the screw, it should be ok to reuse. I still have the factory crush washer on he engine drain plug and it doesn't leak a drop after 25 oil changes.
     
  7. Mar 20, 2017 at 5:13 AM
    #7
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    Ncskeeter [OP] likes this.
  8. Mar 20, 2017 at 5:19 AM
    #8
    gearcruncher

    gearcruncher Well-Known Member

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  9. Mar 20, 2017 at 5:20 AM
    #9
    DaveInDenver

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    You're not supposed to reuse the gaskets, the torque value is based on that. I believe the gasket would be the one that looks similar to this (the steel style, although this is just a Google image search). They definitely crush when you torque them. I'm not sure what you'd use for a torque value if you reuse the gasket but it certainly would seem lower would be necessary.

    I buy drain plugs in bulk and keep them around, in my case one type for axles (steel), another for transmission/transfer (both aluminum cases since I have a manual) and a third for the engine pan. I'm probably a Homer for following the FSM more or less exactly, though if you buy 10 at a time they're something like $2 each that way.

    drainplugwasher.jpg

    s-l1600.jpg
     
    Last edited: Mar 20, 2017
  10. Mar 20, 2017 at 5:21 AM
    #10
    TopDawg1776

    TopDawg1776 INFERNO!!!

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    Toyota seems to want your stuff on your truck way tighter than what it can be. At my first oil change, the oil filter was on there so tight the mechanics had to get step stools and tools to get it off. They couldn't just unscrew it by hand.
     
  11. Mar 20, 2017 at 6:19 AM
    #11
    DaveInDenver

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    BTW, @Ncskeeter, assuming you stripped the pan threads it's actually not a terribly expensive part. Looks to be Toyota p/n 35106-0C010, retail is $118.20 and you can get from the various Internet sources for about $85.
     
  12. Mar 20, 2017 at 11:42 AM
    #12
    fla_sun

    fla_sun Well-Known Member

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    I did the same thing, the pan has a round nut soldered on and it spins when too much torque applied. Good thing is it doesn't leak when spinning. I too used 21 ft lbs.
    [​IMG]

    I bought a new pan, drain plug and gasket. This time I used the same washer as the engine oil drain plug on both drain and overflow and torqued to 12 ft lbs. No leaks or problems since. I did look at the pan every day for a few weeks and that was last July.

    I got the pan and plug at Lakeland Toyota overstock for about $87. Fel-Pro TOS 18736 Gasket from Amazon for $14
     
    Last edited: Mar 20, 2017
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  13. Mar 20, 2017 at 4:47 PM
    #13
    Ncskeeter

    Ncskeeter [OP] Well-Known Member

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    @fla_sun Thanks for the info. It's helpful to know what's on the other side of the pan.

    I got two quotes today and it looks like I'm out about $175 for this mistake if I get all OEM parts and Toyota WS fluid. On the plus side, I'll have done two drain and fills back to back so I'll have a higher percentage of new fluid in it than I otherwise would.

    Update: I removed the plug and drained the pan tonight. It was a PITA to get the plug out. There was a lot of resistance backing it out and the nut on the inside was obviously loose. I could feel it wobbling and going up and down. I had to pull down with vise grips while turning to get it out. There was one thread left on the plug. The rest is smooth. I can't believe that I managed to strip it this bad.
     
    Last edited: Mar 20, 2017

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