Transmission question

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Thread: Transmission question

  1. #1
    Join Date
    Jun 2010
    Round Rock
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    Default Transmission question

    Hi all, I have a 2007 Tundra DC with the 5.7 and 6 speed with 33,000 miles. I have been reading about the 'tap from behind' and 'rumble strip' topics and not sure if my situation is one/both/none of these. I did have the drive shaft replaced as part of a leaking input shaft issue. The sypmtom(s) my truck is having existed before and after the drive shaft replacement. (I could be wrong but it seems worse after)

    When I come to a stop,after a couple seconds, it feels like the transmission downshifts. This sounds like the 'tap from behind' issue. I still sometimes look in the rearview mirror expecting to see a car that bumped into me.
    Also, after I slow down (but do not stop completely) to make a turn and then start to accelerate the transmission feels like it goes into neutral and then slams in to gear. The rpms go up while it seems to be in neutral.
    I think these are related, but haven't seen both issues described together. I'm going to take in to the dealer but wanted to see if anyone else has experienced this and what they did to fix it. These symptoms don't happen every time, but do happen a lot. Otherwise, the trans seems to shift up and down normally.
    For me it is now a safety issue because when I am turning left into my neighborhood and have to cross oncoming traffic, it will get your adrenaline up when you are expecting the truck to accelerate and if feels like it is in nuetral (or the torque convertor is slipping).

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  3. #2
    Junior Member cinch's Avatar
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    Oct 2010
    Boulder Creek Ca
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    Default Re: Transmission question

    Both of those problems were very common in newer Tacomas. I don't know if it's the same for Tundra's.

    The "tap from behind" issue was caused by the slip joints in the driveshaft needing to be greased. They bind up when coming to a stop and then a few seconds later releases.

    The transmission issue occured in all second gen Tacomas. There is an ECU reflash fix for that.
    Last edited by cinch; 11-04-2010 at 10:46 AM.

  4. #3
    Junior Member Retired Wrench's Avatar
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    Oct 2008
    Northern California
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    Default Re: Transmission question

    Second problem sounds like symptoms of low fluid level.....Perhaps from the driveline changing procedure etc

  5. #4
    Junior Member steppy's Avatar
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    Oct 2009
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    Default Re: Transmission question

    I think the second problem is just that 1st gear is very low(especially with tow package) and our trucks are programmed to always be in 1st below +/- 5 mph.

    My truck suffers from the same symptom and I always wonder why it doesnt just know to hold 2nd gear while your rolling...and only hit 1st after complete stop (ECU must not factor lower differential gearing???)

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