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Rear diff leak

Discussion in '1st Gen. Tacomas (1995-2004)' started by labrador01, Jun 6, 2018.

  1. Jun 6, 2018 at 1:03 PM
    #1
    labrador01

    labrador01 [OP] Well-Known Member

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    while underneath my truck yesterday I noticed it has developed a leak where the drive shaft goes into the rear diff. What’s going to have to be replace to make this stop leaking?

    E93BCD3A-4D8F-47D0-942F-A43FA83E01CE.jpg
     
  2. Jun 6, 2018 at 1:09 PM
    #2
    2015 TRD Sport

    2015 TRD Sport Well-Known Member

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    Going to have to replace the pinion seal
     
  3. Jun 6, 2018 at 1:11 PM
    #3
    Kiloyard

    Kiloyard Road Warrior

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    Looks like a leaky pinion seal. Gonna have to take that sucker apart and replace it. It's not a small job.
     
  4. Jun 6, 2018 at 1:11 PM
    #4
    SouthernYoder

    SouthernYoder If you skarred, say you skarred.

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    Rear end pinion seal. My Jeep has the same issue and I’m going to assume that’s what it is. Hopefully no bearing issue but that’s my .02.

    Haven’t took one out of a taco but it’s pretty simple from what I did. Mark everything on the driveshalf and yoke as well u-joint and rear end nut. Pull straps off u-joint, swing aside driveshalf proped on something, take rear end nut off, propbably torqued to hell and back, then remove the seal that sits in it, then repeat.

    Edit: Before you put seal in rtv where seal sits and put gear oil on rubber seal so it’s lined and not dry.

    Subbed just in case I have to do it soon as well.

    Good luck sir.
     
  5. Jun 7, 2018 at 6:34 AM
    #5
    tacoma665

    tacoma665 Well-Known Member

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    Before you do anything make sure the pressure release valve on top of the differential pushes up and down. If it is rusted shut it won't move and the pressure builds up causing a leak. Many times replacing or cleaning the valve stops the leak.
     
  6. Jun 7, 2018 at 7:56 AM
    #6
    labrador01

    labrador01 [OP] Well-Known Member

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    can anyone verify the part # for a 2001 double cab 4x4? I'm seeing different part numbers on ebay
     
  7. Jun 7, 2018 at 7:59 AM
    #7
    labrador01

    labrador01 [OP] Well-Known Member

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  8. Jun 7, 2018 at 8:10 AM
    #8
    labrador01

    labrador01 [OP] Well-Known Member

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    are you referring to the rear diff breather?
     
  9. Jun 7, 2018 at 8:18 AM
    #9
    tacoma665

    tacoma665 Well-Known Member

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    Yes, the breather
     
  10. Jun 7, 2018 at 8:24 AM
    #10
    labrador01

    labrador01 [OP] Well-Known Member

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    I did do the rear diff mod last year, and I did just notice the where I located it the breather was slightly moved and pushed shut. However at this point, it's probably still safe to assume the seal is bad? I'll see what happens in a couple days.
     
    Last edited: Jun 7, 2018
  11. Jun 8, 2018 at 4:42 AM
    #11
    tacoma665

    tacoma665 Well-Known Member

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    Yeah I would make sure the breather mod is working and then take some brake cleaner and spray the area to clean it up. Then monitor for a leak.
     

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