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Transmission fluid check

Discussion in '1st Gen Tundras (2000-2006)' started by 2003stepside, Feb 17, 2020.

  1. Feb 17, 2020 at 1:25 PM
    #1
    2003stepside

    2003stepside [OP] New Member

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    Hi all, just noticed my 2003 Tundra is slinging transmission fluid where driveshaft enters transmission. I am assuming a leaking seal on transmission. Not a bad leak ( does not leak on garage floor) but I am concerned. I looked in owners manual for instructions to check fluid and could not find any. I did find where Toyota states to not change transmission fluid if used under normal driving conditions. Is there a correct way to check transmission fluid level ? If the seal is leaking is this a common problem on the tundra? My tundra is at 144k miles. Anyone know what cost would be to replace seal ?
     
  2. Feb 17, 2020 at 2:10 PM
    #2
    Bubbadog

    Bubbadog New Member

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    Is your truck a V6 or V8?
    Auto or Manual?

    My 2001 V8 automatic Tundra has a dipstick for the transmission. I thought the 2003 V8 autos had one as well. It is on the passenger's side of the engine bay.
     
  3. Feb 17, 2020 at 2:10 PM
    #3
    SoCalPaul

    SoCalPaul New Member

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    I'm pretty sure the 2003 has a A/T dipstick. I don't think the "sealed" transmissions came until 2005. If you have a "sealed" transmission, there should be a second drain plug in a recessed hole on the bottom of the transmission pan. remove that plug & fill from the fill plug until it runs out the recessed plug. The transmission should be at operating temperature for either transmission.
     
  4. Feb 17, 2020 at 2:25 PM
    #4
    PCJ

    PCJ New Member

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    Yes, you're correct. My "04" has a dipstick my son's "05" doesn't.
     
  5. Feb 17, 2020 at 2:50 PM
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    FrenchToasty

    FrenchToasty Desert rat

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    The sealed tranny actually needs to be around 112 degree temp fluid before pulling the check fluid overfill bolt.
     
  6. Feb 17, 2020 at 3:19 PM
    #6
    2003stepside

    2003stepside [OP] New Member

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    It’s the 4.7 v8 with auto transmission. I located the dipstick. What are correct procedure for checking the fluid level ? Engine off or running in park ? Appreciate all the input.
     
    Aerindel likes this.
  7. Feb 17, 2020 at 3:20 PM
    #7
    Aerindel

    Aerindel New Member

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    Check fluid level after truck is fully warmed up, after driving a few miles.

    You check WHILE THE ENGINE IS RUNNING, IN PARK. There is a Hot and Cold range on the dipstick. The cold range is only for reference when refilling a tranny.

    If you need to add fluid, you use a long skinny funnel and do it through the dipstick hole.
     
    school teacher likes this.
  8. Feb 17, 2020 at 3:30 PM
    #8
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Oldie but goodie. Disregard fluid levels on this spec. Just make sure your fluid level hits the hot mark

    upload_2020-2-17_18-29-40.jpg
     
  9. Feb 17, 2020 at 3:44 PM
    #9
    2003stepside

    2003stepside [OP] New Member

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    Got it. That’s what I need. Thanks everyone!!
     
  10. Nov 21, 2020 at 3:09 PM
    #10
    FundraTRD

    FundraTRD New Member

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    Thank you, this post and all the reply’s helped me as well
     

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