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Gimme your .02 cents... and nobody gets hurt! -- Leaking rear axle (seal?)

Discussion in 'Technical Chat' started by ready2dodamage, Jul 28, 2013.

  1. Jul 28, 2013 at 7:01 PM
    #1
    ready2dodamage

    ready2dodamage [OP] Well-Known Member

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    Discovered this the other morning :eek: ahhhhhhh! :eek: ahhhhhhh! :eek: ahhhhhhh! :help:

    [​IMG]

    Okay, I guess the world will keep turning, but WTF! Truck has less than 80K and I drive like a grampa.

    For all the amateurs out there *cough* who probably spent the better part of an hour (*cough* two hours *cough*) trying to decipher the FSM diagram; fin-a-gle two screwdrivers through that unbelievably small access port; dial back the brake pads; and remove the drum; meet your enemy. Face-to-face, Mano-a-mano.

    [​IMG]

    [​IMG]

    Circumferential montage of the Exxon Valdez parked in my driveway.

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    Other (potentially relevant?) Details
    (1) I changed my rear differential fluid at 75K miles back in May (did a bunch of towing in the months prior and it was looking super black). Used 75-90, cheap dinosaur oil from Autozone.

    (2) Checked the fluid today, it still looks new and the differential is quite full.

    (3) When I removed the rear differential "fill" plug I heard a loud "hissing" noise. Didn't notice that last time.

    (4) Photo of the passenger side wheel, ran out of daylight for drum disassembly. Also, difficult to tell it anything is leaking?
    [​IMG]

    Questions:
    (1) I'm having trouble finding a DIY for a 2nd. Gen Tacoma, any ideas about how on-point these DIYs are? http://www.4x4wire.com/toyota/maintenance/rear_axle/oil_seal/

    (2) Parts! Inner and outer oil seals, wheel bearing, brake hardware and pads... anything else?

    (3) Should I do the passenger side?
     
  2. Jul 28, 2013 at 7:30 PM
    #2
    azreb

    azreb Geezer

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    A couple of thoughts. Could the hissing sound possibly be related to a plugged vent? Maybe the leakage is due to pressure build-up in the housing.

    Whatever is the cause, I would not tinker with the other side. If it ain't broke, don't fix it.
     
  3. Jul 28, 2013 at 7:43 PM
    #3
    That Dude Tim

    That Dude Tim Toyota Technician

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    Falken Wildpeak AT3/W, BLK Mk6, ICON's, Firestone Ride Rites, SHLM, Rear view camera switch, 7-pin in bumper, Lighted 4x4 switch, ImMrYo bracket, mudflap delete
    I will say this. You will need new brakes shoes and they come in pairs, and when doing brakes you do both sides. Your going to have to drain the diff again also. Along with the fact that you have high miles, and the one side is already bad. I'd do both sides since some of the work will be done already and you'll have some of the parts for that side anyways.

    Here is a thought if you don't replace the pass side seal. You add new diff fluid and use the new brake shoes on that side. Then in say 4 weeks that side goes bad. Guess what, that money and time saved for not doing it with the other side just bit your ass. Not worth copping out in my opinion, do both sides at the same time. Seals are cheap.
     
  4. Jul 28, 2013 at 7:47 PM
    #4
    ready2dodamage

    ready2dodamage [OP] Well-Known Member

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    @That Dude Tim, wise advice. Makes a lot of sense. Given what azreb said about the breather, do you think replacing that might stop the leak? Or is that seal likely shot?
     
  5. Jul 28, 2013 at 7:53 PM
    #5
    Spoonman

    Spoonman Granite Guru

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    The hissing is your breather being plugged which probably caused the seal to start leaking well. Make sure it's the axle seal and not the wheel cylinder. Clean your breather then replace the seal. I'd do both.
     
  6. Jul 28, 2013 at 8:10 PM
    #6
    That Dude Tim

    That Dude Tim Toyota Technician

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    It could be possible that diff breather has clogged and the diff pressure built up to cause the drivers rear seal to leak. Unlikely in my opinion though.

    If it smells like diff fluid it's the seal. Brake fluid and diff fluid smell differently. I'd get a new breather, 2 new axle seals, plus the other necessary stuff like shoes, diff fluid, etc.

    Edit: on top of the 2 Toyota axle seals you'll need 2 o-rings that are on the axle sub-assembly also.
     
    Last edited: Jul 28, 2013
  7. Jul 28, 2013 at 8:21 PM
    #7
    ready2dodamage

    ready2dodamage [OP] Well-Known Member

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    I appreciate the input. In the process of assembling a parts list.

    I'll post it up tomorrow to make sure I covered everything. Thanks again.
     
  8. Jul 28, 2013 at 8:24 PM
    #8
    no mods

    no mods Well-Known Member

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    Funny thread.. To fix your leak you going to have to press new bearings as the seal that's most likely leaking the is the one that is mates to the wb.
     
  9. Jul 28, 2013 at 8:28 PM
    #9
    That Dude Tim

    That Dude Tim Toyota Technician

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    I tried getting you the Toyota part number for that o-ring off alldata but it didn't have one. It shows it and says to replace with a new one but doesn't have it listed with the axle seal under parts and labor.

    Axle seal OEM part # 9031058003
     
  10. Jul 28, 2013 at 8:33 PM
    #10
    no mods

    no mods Well-Known Member

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    U can get the axle seal from Smyth, rock auto or even oreily / autozone may have it. I paid something like $10.0 each for mine. But I'm telling you that won't fix your leak. U will still have to press on a wheel bearing. I've blown my on both side so I'm telling you from experience
     
  11. Jul 29, 2013 at 1:05 PM
    #11
    ready2dodamage

    ready2dodamage [OP] Well-Known Member

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    Alright, as promised, here's what I came up with for parts. I generated this just from looking through the FSM diagrams. (Axel Diagram, at p. 3233; Drum Diagram, at p. 3813)

    Also, I've attached a .pdf of my shopping cart. However, some items are not showing up :notsure:

    PLEASE, chime in and point out where I screwed up!

    Axle Parts
    (1) Rear Axle Shaft Oil Seal x2 -- 90310-58003

    (2) Rear Axle Shaft O-Ring x2 -- 90301-83002

    (3) Rear Axle Shaft Snap Ring x2 -- 90520-41019

    (4) Rear Axle Bearing Retainer Inner x2 -- 42423-60050

    (5) Rear Axle Bearing x2 -- 90366-51001

    (6) Rear Axle Shaft Washer x2 -- 90208-44001

    (7) Brake Drum Oil Deflector Gasket x2 -- 42444-35050

    (8) Rear Axle Hub Bolts x12 -- 90942-02049



    Brake Parts
    (1) Rear Brake Shoe Assembly Kit (1 or 2 ??) -- 04495-04010

    (2) Brake Drum Oil Gasket x2 -- 42443-60010

    Breather Mod [http://www.tacomaworld.com/forum/technical-chat/111954-my-differential-breather-mod-photos.html]
    (1) Breather -- 90930-03136

    (2) Union -- 90404-51319

    (3) Hose, Hose clamps, Zip ties

    Fluids
    (1) 3qts. 75-90 Gear oil
    (2) 2qts brake fluid.
    (3) 1 ton (2000lbs) of brake cleaner.
     

    Attached Files:

    Last edited: Jul 30, 2013
  12. Jul 29, 2013 at 2:29 PM
    #12
    That Dude Tim

    That Dude Tim Toyota Technician

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    Looks pretty good. Might want a few other opinions from others to have a glance. Good luck if your doing it yourself.
     
  13. Jul 29, 2013 at 2:35 PM
    #13
    ready2dodamage

    ready2dodamage [OP] Well-Known Member

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    Thanks, any idea if that "brake shoe assembly kit" includes parts/pads for both sides?
     
  14. Jul 29, 2013 at 2:37 PM
    #14
    That Dude Tim

    That Dude Tim Toyota Technician

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    Is that a Toyota kit or one from another parts supplier? Usually a brake hardware kit includes hardware for both sides. Only things that are per side are the self-adjusters, because those are side specific.
     
  15. Jul 29, 2013 at 6:52 PM
    #15
    ready2dodamage

    ready2dodamage [OP] Well-Known Member

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    I'm pricing / plan to buy through ToyotaPartsZone.com. Bought some parts from them in the past and was happy with the price and shipping speed.

    They list a several "kits" under the "Rear Brake Drum" section, as follows:
    -Reaction Plate Kit, Rear Brake, Lh -- 04955-08030 -- $21.86
    -Reaction Plate Kit, Rear Brake, Rh -- 04954-08030 -- $21.86
    -Shoe Kit, Rear Brake -- 04495-04010 -- $56.43 (Manufacture Notes: Mark Nbk D9033)???
    -Spring Kit, Rear Brake -- 04942-45010 -- $54.21
    -Spring Kit, Rear Brake Shoe Hold Down -- 04941-45010 -- $22.08
    -Strut Kit, Rear Brake -- 04943-04010 -- $58.66

    Besides the "shoe kit," what else must I buy?
     

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