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Changing differential fluid - A step by step "HOW TO"

Discussion in 'Technical Chat' started by brianr, Jan 21, 2009.

  1. Jun 24, 2013 at 8:17 PM
    #1381
    Janster

    Janster Old & Forgetful

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    I couldn't agree more. I asked a similar question on their facebook page - and got a 'generic' response. I've read this same paragraph on their website.
    https://www.facebook.com/mobil1/pos...tal_comments=1&ref=notif&notif_t=feed_comment

    Hi Jandy - Mobil 1 Synthetic Gear Lube LS 75W-90 contains special friction modifiers designed for limited slip-type differentials. In most applications, the addition of special LS (limited slip) additives is not required. For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid. Thanks for using Mobil 1!

    They could theoretically claim they put it in ...but that statement covers just about every situation on the planet. I've always used Mobile 1 and the changes they've claimed over the years never cease to confuse the crap out of me (to the point they're not believable).

    We have used Amsoil Severe Gear in our Corvette diff. That's a highly recommended oil for the corvette diffs and its worked great. Not easy or convenient to get a hold of.....

    Doesn't matter..... diffs are done, chatter is gone (after 1.5bottles). In 3 years from now when I'm ready to do it again - things will probably be different and confusing once again. :D
     
  2. Jun 24, 2013 at 9:36 PM
    #1382
    maxamillion2345

    maxamillion2345 Go home if you don't like guns liquor and whores.

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    Won't do that again! :p
     
  3. Jun 27, 2013 at 5:05 AM
    #1383
    cleveland48

    cleveland48 Well-Known Member

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    If u use anti -seize on this do u have to lower the ft- lbs when u torque them down? I will be working on this this weekend. Got some anti- seize I thought about using on all my diffs. Since I've already heard stories about how hard some are to get out the first time, though mainly its the front diff and transfer case I've heard of issues from.
     
  4. Jun 27, 2013 at 6:56 AM
    #1384
    byrd

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    I didn't have any problem breaking loose any of my drain/fill plugs on my diffs, transfer case nor tranny from the factory fill. I also didn't use a 24MM socket as it felt a little loose on the nut. I used a 6 point 15/16 socket which fit on tight. As for the 10MM hex I took a hammer and tapped it in and then slipped the racket on. No issues.
    I suppose it wouldn't hurt to use anti-seize on them.
     
  5. Jun 27, 2013 at 8:22 AM
    #1385
    DirtEater

    DirtEater Well-Known Member

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    Good info on the 15/16 socket. I did the math and you're right, it is slightly smaller than a 24mm. I haven't done mine yet but I did buy a 24mm for it, and I'm betting that I already have a 15/16. Thanks.
     
  6. Jun 27, 2013 at 8:28 AM
    #1386
    DirtEater

    DirtEater Well-Known Member

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    What is the 10mm hex for? Not sure if I've forgot something or simply overlooked.
     
  7. Jun 27, 2013 at 1:41 PM
    #1387
    byrd

    byrd Member

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    10MM hex fits Front Differential fill & drain plugs.

    24MM or 15/16 6 point socket will fit Transfer Case, Manual Trans and Rear Differential fill & drain plugs, a 12 point socket from what I've read can cause the bolt head to strip and/or leave marks. My 24MM socket was a 12 point which could be why it felt loose, my 15/16 was a 6 point.
     
  8. Jun 27, 2013 at 2:51 PM
    #1388
    DirtEater

    DirtEater Well-Known Member

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    Thanks! The 24 mm I got from Northern Tools is an el cheapo $5 socket, but it's a 6 point socket. I checked the fit, and it seems snug...
     
  9. Jun 29, 2013 at 10:06 PM
    #1389
    BRUIN8124

    BRUIN8124 Well-Known Member

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    I have never done this and it seems pretty simple.

    I am not exactly the most mechanic savvy person but I am learning a lot from this site. I do my own oil changes, thats about as much as I get into it. ...for now anyways

    My 09 DCSB 4X4 (no locker, no TRD) has roughly 65K on it and I dont know when this was done last. I imagine there is some nasty stuff in there.

    Any advice for a first timer. I guess I am concerned about seals, leaks etc. I do have the LSD and I am a bit confused regarding whether an additive is needed or not. Right now everything is fine and I dont want to mess anything up.

    Thank you all for the info and wish me luck!

    AT Fluid change and Front transfer case fluid change maybe next if this goes well.
     
    Last edited: Jun 29, 2013
  10. Jun 30, 2013 at 1:22 AM
    #1390
    Janster

    Janster Old & Forgetful

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    You have an 09 which should have the AUTO LSD -which is brake actuated. You do not need friction modifier.

    But to be safe, walk around to the rear of your truck and take a look at your rear diff. If there's a red/white sticker that says "Only LSD Oil", then you'll need friction modifier. I'd post a photo of the sticker but I can't do it with the phone.
     
  11. Jun 30, 2013 at 8:40 AM
    #1391
    ImpulseRed008

    ImpulseRed008 Gone But Not Forgotten

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    You only need the additive if you have this sticker ^^
     
  12. Jul 11, 2013 at 10:17 AM
    #1392
    Jayhawker

    Jayhawker New Member

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    At 60k I changed the oil in the rear on my 06 Taco. 80W-90 with a LSD additive.

    I'm 18K down the road and I noticed a chatter. So here's the question.
    More additive or drain and start over?
     
    Last edited: Jul 11, 2013
  13. Jul 11, 2013 at 11:26 AM
    #1393
    Gene563

    Gene563 Well-Known Member

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    In my situation, I overfilled and syphoned some out. I didn't really notice chatter, but did experience the inside wheel spinning where it normally wouldn't.
    I added a little more additive. Also, someone here mentioned "figure 8s"; I went to an open parking lot and did a couple slow, tight, figure 8s, and gave it some more time. It seems fine now. It may just take a while to mix all the fluids properly.
     
  14. Jul 11, 2013 at 3:28 PM
    #1394
    ImpulseRed008

    ImpulseRed008 Gone But Not Forgotten

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    Maybe your fluid is low?
     
  15. Jul 15, 2013 at 1:09 PM
    #1395
    Gitmo

    Gitmo Well-Known Member

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    Couple questions before I change the diff oil front & rear as well as the t case oil..

    What should the fill and drain plug be torqued at for the front & rear? This thread says 36lb-ft for both while another thread says the front diff fill plug should be torqued at 29lb-ft and the drain plug at 48lb-ft. Doesn't say anything about the rear..
    http://www.tacomaworld.com/forum/2n...ront-diff-transfer-case-oil-change-howto.html


    So what should I torque the fill/drain plugs for the front & rear diff?
     
  16. Jul 15, 2013 at 1:33 PM
    #1396
    byrd

    byrd Member

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    Manual states this:
    Front Differential: Fill Plug 29 ft-lbs Drain Plug 48 ft-lbs
    Rear Differential: Fill/Drain plugs 36 ft-lbs
    Transfer Case: Fill/Drain plugs 27 ft-lbs
    Manual Transmission: Fill/Drain plugs 27 ft-lbs
    Automatic Transmission: Filter bolts 84 in-lbs....Fluid pan bolts 65 in-lbs....Drain plug 15 ft-lbs.......Overflow plug 15 ft-lbs......Refill plug 29 ft-lbs

    Jeez, glad I don't have an automatic :goingcrazy:
     
  17. Jul 15, 2013 at 1:53 PM
    #1397
    Gitmo

    Gitmo Well-Known Member

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    I have an auto :(. Thanks for the info, though!
     
  18. Jul 19, 2013 at 6:12 AM
    #1398
    Sje1124

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    Need to do this soon
     
  19. Jul 19, 2013 at 6:15 AM
    #1399
    Sandman614

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  20. Jul 19, 2013 at 6:16 AM
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    Sje1124

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