1. Welcome to Tacoma World!

    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 Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Differential Hot to the touch and seeping oil around fill? Need help with this one

Discussion in '3rd Gen. Tacomas (2016-2023)' started by tpgillikin3, Jul 18, 2023.

  1. Jul 18, 2023 at 3:30 PM
    #1
    tpgillikin3

    tpgillikin3 [OP] Well-Known Member

    Joined:
    Feb 8, 2021
    Member:
    #355463
    Messages:
    57
    Gender:
    Male
    First Name:
    Timothy
    Beaufort, NC
    Vehicle:
    2017 Super White TRD Off-Road DCSB 4x4
    Camper Shell, Decked System
    See title. I have been hearing a light rumble/ground from the rear for a couple of days but haven’t crawled under until now. Thought it was the parking brake dragging but now I realize it could be this. Not even visibly dripping so I don’t think it would have lost too much fluid. Next step is to drain the oil, but also looking for other suggestions

    869B07D2-110D-44C2-9864-0AD2ACBE96D3.jpg
     
  2. Jul 18, 2023 at 3:34 PM
    #2
    JFriday1

    JFriday1 Well-Known Member

    Joined:
    Jan 14, 2019
    Member:
    #279318
    Messages:
    531
    Gender:
    Male
    First Name:
    Jesse
    Golden, CO
    Vehicle:
    19 Taco TRD-Sport
    Mobile Mechanic in Denver Insta - "Jfriday123"
    Check the level first before draining to see if you can even touch it through the fil hole.. Measure what comes out to get an idea on how much its been low.
     
    tpgillikin3[OP] likes this.
  3. Jul 18, 2023 at 3:45 PM
    #3
    tpgillikin3

    tpgillikin3 [OP] Well-Known Member

    Joined:
    Feb 8, 2021
    Member:
    #355463
    Messages:
    57
    Gender:
    Male
    First Name:
    Timothy
    Beaufort, NC
    Vehicle:
    2017 Super White TRD Off-Road DCSB 4x4
    Camper Shell, Decked System
  4. Jul 18, 2023 at 3:52 PM
    #4
    Speedfreak

    Speedfreak Member in poor standing

    Joined:
    Sep 22, 2017
    Member:
    #230756
    Messages:
    4,828
    First Name:
    Dave
    Canada Eh!
    Vehicle:
    2017 Tacoma TRD Sport DCSB 6MT, Blazing Blue Pearl
    Manual Mall Crawler
    I would put the rear diff on jack stands. Put the trans in neutral with the park brake off and check for pinion play. Grab a hold of the pinion and try to move it up and down. It should not have any play. Next rotate the pinion back and forth slightly, to see if pinion to ring hear play is excessive. There should be a small amount. Next, I would rotate the pinion and feel if there is any roughness in the assembly. It should spin smoothly with resistance from the weight of the wheels and axles. Next, remove the fill plug and see if the there is oil just under the opening of the plug hole. If there is, then the fluid level is alright. Next you can drain the fluid and filter the fluid through a cloth or heavy duty paper towel. Look for metal in the filter media. Also look for heavy metal sheen in the fluid. If everything checks out then refill and see if the noise continues or worsens.


    It is normal for a diffential to be hot to the touch after driving a while. And it isn't uncommon for the plugs to sweat fluid. The noise, if it is from the diff is something that may or may not be an issue of concern.
     
    usmc2msu, 513Mugsy, jmneill and 3 others like this.
  5. Jul 18, 2023 at 3:53 PM
    #5
    AM6217

    AM6217 Well-Known Member

    Joined:
    Aug 3, 2021
    Member:
    #373030
    Messages:
    1,043
    Gender:
    Male
    Vehicle:
    2021 SR-5 DCSB Silver metallic
    Did you perhaps fail to put the washer back when buttoning it up after fluid change ?
     
    zoo truck likes this.
  6. Jul 18, 2023 at 3:59 PM
    #6
    tpgillikin3

    tpgillikin3 [OP] Well-Known Member

    Joined:
    Feb 8, 2021
    Member:
    #355463
    Messages:
    57
    Gender:
    Male
    First Name:
    Timothy
    Beaufort, NC
    Vehicle:
    2017 Super White TRD Off-Road DCSB 4x4
    Camper Shell, Decked System
    Verified that the washer is on there, and there was fluid behind the plug when I took it off. But that was a good thought!
     
  7. Jul 18, 2023 at 4:00 PM
    #7
    AM6217

    AM6217 Well-Known Member

    Joined:
    Aug 3, 2021
    Member:
    #373030
    Messages:
    1,043
    Gender:
    Male
    Vehicle:
    2021 SR-5 DCSB Silver metallic
    vent clogged ?
     
  8. Jul 18, 2023 at 4:02 PM
    #8
    Williston

    Williston Well-Known Member

    Joined:
    Aug 21, 2021
    Member:
    #374833
    Messages:
    1,855
    Gender:
    Male
    New England
    Vehicle:
    2014 Tacoma Super White V6 AT SR5 4x4 DC SB Tow Pkg Entune+
    Super White Stock (99.999%) OEM Bed Floor Mat, Cargo Net, Auto-Dim mirror w/Compass and outside Temperature display, TRD Pro Grille, Uni-Filter air pump modification, WeatherTech floor liners f/r.
    I can't really see the seeping, so I'm not sure there is an issue except maybe snug up the plug a little. Better yet: check it when it's -cold- and install a new fill-plug gasket when you put it back together. If it seeps a little when it's cold, wait until it's a drip and install the plug. Spray the area with brake-kleen and monitor it. Don't remove the drain plug until you verify the fill-plug will come out. If there are major issues with the diff: the magnetic drain plug will indicate it. (A little metallic fuzz is normal.)

    Warm/hot diff is normal: That's why it requires 75W90 oil. :thumbsup:
     
    Last edited: Jul 18, 2023
    zoo truck and tpgillikin3[OP] like this.
  9. Jul 18, 2023 at 4:08 PM
    #9
    tpgillikin3

    tpgillikin3 [OP] Well-Known Member

    Joined:
    Feb 8, 2021
    Member:
    #355463
    Messages:
    57
    Gender:
    Male
    First Name:
    Timothy
    Beaufort, NC
    Vehicle:
    2017 Super White TRD Off-Road DCSB 4x4
    Camper Shell, Decked System
    Vent looked pretty clear but I blew it out just in case. I’m thinking I’m just dealing with a very slight seep like Speed mentioned. I did do something a little stupid a few weeks back when I pulled the parking brake to the max in a bit of a panic. Could I have pulled it out of adjustment and that’s the noise I’m hearing?
     
  10. Jul 18, 2023 at 4:09 PM
    #10
    TnShooter

    TnShooter The TacomaWorld Stray

    Joined:
    Sep 2, 2010
    Member:
    #42625
    Messages:
    18,574
    Gender:
    Male
    First Name:
    Deogee
    Vehicle:
    07' TRD Off-Road, Auto
    STOCK
    I don’t see your leak?
    That looks like old gear oil with road grim.
    Likes it’s been there awhile.

    Gear oil sticks around.
    I usually take Brake/Carb cleaner and spay the diff off after I refill.
    And I do torque the drain plug.
     
    Hairless_Ape, Williston and AM6217 like this.
  11. Jul 18, 2023 at 4:14 PM
    #11
    AM6217

    AM6217 Well-Known Member

    Joined:
    Aug 3, 2021
    Member:
    #373030
    Messages:
    1,043
    Gender:
    Male
    Vehicle:
    2021 SR-5 DCSB Silver metallic
    Does that truck have zerk fittings on the u joints ?
     
  12. Jul 18, 2023 at 4:16 PM
    #12
    tpgillikin3

    tpgillikin3 [OP] Well-Known Member

    Joined:
    Feb 8, 2021
    Member:
    #355463
    Messages:
    57
    Gender:
    Male
    First Name:
    Timothy
    Beaufort, NC
    Vehicle:
    2017 Super White TRD Off-Road DCSB 4x4
    Camper Shell, Decked System
    I should have taken a picture when I first crawled under there. I had already wiped the grime and spot of oil around from the fill but I agree on that it wasnt very much oil on the diff. Which makes me feel a little better
     
    TnShooter[QUOTED] likes this.
  13. Jul 18, 2023 at 4:20 PM
    #13
    tpgillikin3

    tpgillikin3 [OP] Well-Known Member

    Joined:
    Feb 8, 2021
    Member:
    #355463
    Messages:
    57
    Gender:
    Male
    First Name:
    Timothy
    Beaufort, NC
    Vehicle:
    2017 Super White TRD Off-Road DCSB 4x4
    Camper Shell, Decked System
    It does, but only on the forward ones. They probably need to be serviced again as I did it at the 90k change of fluids
     
  14. Jul 18, 2023 at 4:21 PM
    #14
    AM6217

    AM6217 Well-Known Member

    Joined:
    Aug 3, 2021
    Member:
    #373030
    Messages:
    1,043
    Gender:
    Male
    Vehicle:
    2021 SR-5 DCSB Silver metallic
    I thought it may have rear also.
     
  15. Jul 18, 2023 at 4:22 PM
    #15
    Williston

    Williston Well-Known Member

    Joined:
    Aug 21, 2021
    Member:
    #374833
    Messages:
    1,855
    Gender:
    Male
    New England
    Vehicle:
    2014 Tacoma Super White V6 AT SR5 4x4 DC SB Tow Pkg Entune+
    Super White Stock (99.999%) OEM Bed Floor Mat, Cargo Net, Auto-Dim mirror w/Compass and outside Temperature display, TRD Pro Grille, Uni-Filter air pump modification, WeatherTech floor liners f/r.
    Park it on a slight incline, (in your driveway if you can) put it in neutral and slowly apply the parking brake when it picks up a little speed and see how long it takes to start to slow the truck down. Listen for the noise you're hearing. For reference, I have the foot-pedal type and it starts to apply about 1/3 of the way down. It's fully on and stops the truck before it's all the way down. The parking brake is 100% mechanical, so I can't see how a panic-application would throw it all out of kilter.
     
  16. Jul 18, 2023 at 4:23 PM
    #16
    tpgillikin3

    tpgillikin3 [OP] Well-Known Member

    Joined:
    Feb 8, 2021
    Member:
    #355463
    Messages:
    57
    Gender:
    Male
    First Name:
    Timothy
    Beaufort, NC
    Vehicle:
    2017 Super White TRD Off-Road DCSB 4x4
    Camper Shell, Decked System
    If they are on the rear I haven’t been able to locate them. From what I read Toyota did away with the rear zerks prior to my truck year and then got rid of the fronts shortly after mine was made
     
  17. Jul 18, 2023 at 4:24 PM
    #17
    AM6217

    AM6217 Well-Known Member

    Joined:
    Aug 3, 2021
    Member:
    #373030
    Messages:
    1,043
    Gender:
    Male
    Vehicle:
    2021 SR-5 DCSB Silver metallic
  18. Jul 18, 2023 at 4:24 PM
    #18
    tpgillikin3

    tpgillikin3 [OP] Well-Known Member

    Joined:
    Feb 8, 2021
    Member:
    #355463
    Messages:
    57
    Gender:
    Male
    First Name:
    Timothy
    Beaufort, NC
    Vehicle:
    2017 Super White TRD Off-Road DCSB 4x4
    Camper Shell, Decked System
    While trying to diagnose the noise I tried doing something similar on flat ground and dropping it into neutral once the truck was rolling good. The brake stops the truck pretty hard at the 3rd click on the handle
     
  19. Jul 18, 2023 at 4:27 PM
    #19
    AM6217

    AM6217 Well-Known Member

    Joined:
    Aug 3, 2021
    Member:
    #373030
    Messages:
    1,043
    Gender:
    Male
    Vehicle:
    2021 SR-5 DCSB Silver metallic
    I hear a low pitch coming from mine when I open the power sliding window.
     
  20. Jul 18, 2023 at 4:33 PM
    #20
    Williston

    Williston Well-Known Member

    Joined:
    Aug 21, 2021
    Member:
    #374833
    Messages:
    1,855
    Gender:
    Male
    New England
    Vehicle:
    2014 Tacoma Super White V6 AT SR5 4x4 DC SB Tow Pkg Entune+
    Super White Stock (99.999%) OEM Bed Floor Mat, Cargo Net, Auto-Dim mirror w/Compass and outside Temperature display, TRD Pro Grille, Uni-Filter air pump modification, WeatherTech floor liners f/r.
    Sounds about right. The "handle" parking brake on my son's 2005 has far less travel than my pedal one for full application. I think the true test on my truck is that a full/hard application of the pedal at speed will lock the rear brakes right up before getting all the way to the floor/end-of-travel. IMO: that's the standard.
     

Products Discussed in

To Top