1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Transmission pan gaskets

Discussion in '3rd Gen Tundras (2014+)' started by Oregon 1 Toyo, Mar 14, 2019.

  1. Mar 14, 2019 at 7:54 PM
    #1
    Oregon 1 Toyo

    Oregon 1 Toyo [OP] New Member

    Joined:
    Apr 1, 2018
    Member:
    #14081
    Messages:
    57
    Gender:
    Male
    Vehicle:
    2014 Tundra sr5 double cab 4x4
    I recently dropped the transmission pan on my 2014 Tundra, changed the fluid and ended up taking it to the local Toyota dealer to have the fluid level checked. They added 1.4 quarts because they said it was low. Now my pan gasket is seeping a little in a couple spots, do you think its the fel pro gasket thats not sealing or is the fluid too high?
     
  2. Mar 14, 2019 at 8:04 PM
    #2
    white_sherpa

    white_sherpa New Member

    Joined:
    Dec 6, 2017
    Member:
    #11361
    Messages:
    105
    Gender:
    Male
    Phoenix, AZ
    Vehicle:
    2014 Tundra SR5-Magnuson Supercharged
    Do a quick fluid check. If you have an Inferred Thermo Gun or Scan Gauge, warm up the trans temp between 115-135 if I recall and open the fluid check plug. If its' coming out fast, there's too much. Wait till it starts to dribble out and put the plug back in. Also you'll need a new gasket.. If the oil is coming out dribbling with first check, you are fine.

    Check the bolts to, they should be just above figure tight.. Like 9Nm.

    If it's still leaking after the fluid check, might be the gasket is seated right.
     
  3. Mar 14, 2019 at 8:10 PM
    #3
    white_sherpa

    white_sherpa New Member

    Joined:
    Dec 6, 2017
    Member:
    #11361
    Messages:
    105
    Gender:
    Male
    Phoenix, AZ
    Vehicle:
    2014 Tundra SR5-Magnuson Supercharged
    To add, do you have tow package? If so, did you leave the thermostat open while you added the oil?
     
    Grey Wolf and JohnLakeman like this.
  4. Mar 14, 2019 at 8:16 PM
    #4
    JohnLakeman

    JohnLakeman New Member

    Joined:
    Feb 21, 2019
    Member:
    #26430
    Messages:
    140
    Gender:
    Male
    Vehicle:
    2017 MGM Tundra DC TSS
    TRD Pro grille, Uniflex bed cover, neoprene seat covers, bed/tailgate mats, tailgate power lock, auto headlights, illuminated key
    I suspected OP did not torque the pan bolts, and looked up the torque spec: 7 Nm, or 62 in-lb.
     
    Grey Wolf and white_sherpa like this.
  5. Mar 18, 2019 at 8:56 PM
    #5
    Oregon 1 Toyo

    Oregon 1 Toyo [OP] New Member

    Joined:
    Apr 1, 2018
    Member:
    #14081
    Messages:
    57
    Gender:
    Male
    Vehicle:
    2014 Tundra sr5 double cab 4x4
    When you install the rubber transmission pan gasket is there any need to put any type of sealant where it makes contact with the pan or does it go on as is?
     
  6. Mar 19, 2019 at 5:37 AM
    #6
    JohnLakeman

    JohnLakeman New Member

    Joined:
    Feb 21, 2019
    Member:
    #26430
    Messages:
    140
    Gender:
    Male
    Vehicle:
    2017 MGM Tundra DC TSS
    TRD Pro grille, Uniflex bed cover, neoprene seat covers, bed/tailgate mats, tailgate power lock, auto headlights, illuminated key
    No. No sealant required.

    I believe Toyota must have invented the o-ring style rubber gasket...first one I ever saw was on a 22RE valve cover. You did have to apply silicone sealant where the side gaskets met the half moons at the ends. Your transmission pan gasket is likely different from that, but the engineering approach would still be the same.

    Typically, there's little reason to put sealant on fiber gaskets except to hold them in place while you are contorting around trying to get them aligned into position.
     
    Last edited: Mar 19, 2019 at 5:44 AM
  7. Mar 19, 2019 at 5:57 AM
    #7
    JohnLakeman

    JohnLakeman New Member

    Joined:
    Feb 21, 2019
    Member:
    #26430
    Messages:
    140
    Gender:
    Male
    Vehicle:
    2017 MGM Tundra DC TSS
    TRD Pro grille, Uniflex bed cover, neoprene seat covers, bed/tailgate mats, tailgate power lock, auto headlights, illuminated key
    To make sure you understand, one cause of leaking sheet metal pans and valve covers is over-tightening the pan/valve cover screws.

    Over-tightening deforms the sheet metal flange around the screw hole and possibly in-between screw holes. That is why it is important to use a small torque wrench on sheet metal pan or valve covers. In your case, that would be 62 INCH-lbs, not FOOT-lbs. If you have dimples around the screw holes, you may need to hammer them flat to get it to seal. Pretty tricky to get that right sometimes after you screwed them up (done it myself).
     
    Grey Wolf likes this.
  8. Mar 20, 2019 at 10:03 AM
    #8
    Jimshorts

    Jimshorts New Member

    Joined:
    Tuesday
    Member:
    #27844
    Messages:
    8
    Gender:
    Male
    I used a.sealant for trans....but I broke 4 screws off in rust country Iowa. But drilled out and he'll coiled one the others was a retap so use plenty of lube before and after. Good luck
     
  9. Mar 20, 2019 at 10:44 AM
    #9
    Stumpjumper

    Stumpjumper New Member

    Joined:
    Sep 15, 2016
    Member:
    #4546
    Messages:
    1,428
    Gender:
    Male
    Fate, Tx
    Vehicle:
    2017 Tundra TSS 4x4
    I use to drop the pans on my Fords to clean the screen or replace the filter depending on year. You really need an inch/lb torque wrench. Important thing is to get them all even. Some of the Ford gaskets were more tolerant of over tightening, some not, and some you really couldn't because they had metal rings in the holes. Some were reusable. Once you over tighten one of those go buy a new one. If you have a new one and over tighten by too much then go buy a new one. If I recall correctly Ford torque was less than 120 inch/lbs or less than 10 foot lbs. You are not going to get it correct with a standard torque wrench. I did develop a good feel after doing several and could get by without the torque wrench. I had a buddy that had a Snap-On inch/lb wrench. He said it was almost $100 bill to recalibrate. Oh and NO sealer.
     
    JohnLakeman likes this.
  10. Mar 20, 2019 at 4:27 PM
    #10
    Oregon 1 Toyo

    Oregon 1 Toyo [OP] New Member

    Joined:
    Apr 1, 2018
    Member:
    #14081
    Messages:
    57
    Gender:
    Male
    Vehicle:
    2014 Tundra sr5 double cab 4x4
    I think in my case I under tightened mine and I don’t think my felpro gasket I used may not have been the best quality apparently, I just ordered an oem Toyota gasket and I’m going to give it another try soon. Thanks for the advice!
     

Products Discussed in

To Top