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75W-90 oil okay for rear differential?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Tacoma005, Jan 11, 2016.

  1. Jan 11, 2016 at 7:30 PM
    #1
    Tacoma005

    Tacoma005 [OP] Well-Known Member

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    I have a 2005 TRD Off Road 4X4 with a rear locker, doesn't need the LSD additive in the rear differential. The manual says to use 90W or 80W-90. Would it be ok to use 75W-90 synthetic? I'm going to be buying 75W-90 synthetic for the front differential and transfer case and wondering if I could also use it for the rear differential?
     
  2. Jan 11, 2016 at 7:32 PM
    #2
    KenLyns

    KenLyns 8.75" Third Member

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    I used Castrol 75W-90 synth in the rear diff and got some chatter when accelerating out of a corner. Changed to Quaker State (i.e. Shell) 75W-140 synth and the chatter was gone.

    IMG_5378s%2Bquaker%2B75w140_3f3faf8f15836d86f6f6557d229881f9ddc05172.jpg

    I use Lucas 75W-90 synth in the front diff and T-case because it stinks less than the other brands. :D Used the same in my Subaru's front and rear diffs.
     
  3. Jan 11, 2016 at 7:33 PM
    #3
    Bishop84

    Bishop84 Well-Known Member

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    Depends on climate. We use 75W90 on almost all final drives in Canada.
     
  4. Jan 11, 2016 at 7:48 PM
    #4
    nd4spdbh

    nd4spdbh Well-Known Member

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  5. Jan 11, 2016 at 7:58 PM
    #5
    Tacoma005

    Tacoma005 [OP] Well-Known Member

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    I use Lucas 75W-90 synth in the front diff and T-case because it stinks less than the other brands. :D Used the same in my Subaru's front and rear diffs.[/QUOTE]

    Didn't use the Lucas in the rear differential also? The auto parts store I went to had the Lucas in 75W-90 synthetic so thought I might try that brand.
     
    billybob50 likes this.
  6. Jan 11, 2016 at 8:49 PM
    #6
    KenLyns

    KenLyns 8.75" Third Member

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    As I wrote earlier, I got some chatter with 75W-90 synth. I put Quaker 75W-140 synth in the rear diff in 2014 and the chatter went away. Not due for another change until 2017, at which point I will probably go with Quaker 75W-140 again.

    Note: The "140" means 75W-140 oil can withstand higher temperatures without thinning out, so it can protect the diff better in abusive conditions (burnouts, one-wheel-peel, etc.) than 75W-90. Only thing preventing wider adoption of this oil is the higher cost.
     
    Last edited: Jan 11, 2016
  7. Jan 11, 2016 at 11:28 PM
    #7
    sr5vic

    sr5vic once you go 202 black...

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    Why does the stuff the dealer wants to sell me 4x the price!???
     
  8. Jan 11, 2016 at 11:37 PM
    #8
    konarider1993

    konarider1993 Member

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    75/90 80/90 same thing
     
  9. Jan 12, 2016 at 10:41 AM
    #9
    stump jumper

    stump jumper Well-Known Member

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    because they have to pay for that fancy showroom. As far as the smell you only have to smell it when changing. Maybe the stinky stuff works better.
     
  10. Jan 12, 2016 at 11:50 AM
    #10
    sr5vic

    sr5vic once you go 202 black...

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    This shit. [​IMG]
     
  11. Jan 13, 2016 at 3:56 PM
    #11
    KenLyns

    KenLyns 8.75" Third Member

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    Because Toyota adds 300% markup, then the dealer adds 35% on top of that...

    For Canadians:
    http://www.amazon.ca/Lucas-Oil-10121-Transmission-Differential/dp/B000BCKWVE/
    http://www.amazon.ca/Lucas-10122-140-Synthetic-Gear/dp/B000IG7PMM/ Lol it looks like a bleach bottle.
     
  12. Jan 13, 2016 at 4:23 PM
    #12
    DGXR

    DGXR Well-Known Member

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    Yes any synthetic gear lube 75w90 is fine for your application. 75w85 vs 75w90 vs 80w90 is not going to make any real difference, *unless you are hauling or towing regularly or long-distance* (as nd4spdbh posted above).
     
  13. Jan 13, 2016 at 5:46 PM
    #13
    famous187

    famous187 Active Member

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    so if one does do a fair amount of towing , which weight would be the best? thanks
     
  14. Jan 13, 2016 at 8:02 PM
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    konarider1993

    konarider1993 Member

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    I never use synthetic!
     
  15. Jan 13, 2016 at 8:15 PM
    #15
    Sold My Subaru

    Sold My Subaru 6MT AC TRD OR 1GR-FE FTMFW

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    Yah....If I haul dick with a 3k load behind me at all times then which weight would be appropriate?
     
  16. Jan 13, 2016 at 8:50 PM
    #16
    landphil

    landphil Wishin' I was Fishin'

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    I'm running Chevron full synthetic 75W90 in mine - open diff so no LSD additive. Works well for the big stuff grossing out at 140,000 lbs all day long with 300,000 mile change interval, so I'm not concerned about towing measly few thousand pounds when I change it every 30,000 miles of so.

    I'm running the same stuff in my front diff and transfer case.
     
    DoorDing likes this.
  17. Jan 14, 2016 at 7:39 AM
    #17
    DGXR

    DGXR Well-Known Member

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    famous 187: occasional hauling or towing is not really severe service IMO. Go with the any of the viscosities recommended above but check the level often and change it at regular intervals. Consider a high-end lube -- I use AMSOIL long life synthetic gear lube 75w90 in my 2wd open differential. I haul 800-1200 pounds for 100 miles each way, about 8 times a year. I check the level and condition of the fluid once a year.

    Sold My Subaru: hauling 3,000 lb of dick at all times, that is severe service. I'd suggest using a 75w110 or 75w140, that is specifically designed for severe conditions. That is a lot of dick.

    What's most important: severe service means check it often and change it regularly.
     
  18. Feb 12, 2017 at 5:50 AM
    #18
    boogie3478

    boogie3478 Tacomaholic & Hollywood

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    They aren't called the "stealership" for nuthin.
     
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  19. Feb 12, 2017 at 9:12 AM
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    Sold My Subaru

    Sold My Subaru 6MT AC TRD OR 1GR-FE FTMFW

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    Yah hauling around 3k regularly would be pretty severe for the taco's rear end. I've been happy with the spec fluids thus far. I change it religiously every 30k.
     

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