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For those who re geared (aftermarket gears)- What Gear Oil Weight?

Discussion in 'Technical Chat' started by KaptainH, Dec 10, 2018.

?

What Gear Oil Weight, And Synthetic or Dino?

  1. Synthetic 75w-90

    0 vote(s)
    0.0%
  2. Synthetic 75w-140

    3 vote(s)
    25.0%
  3. Dino 85w-140

    9 vote(s)
    75.0%
  1. Dec 10, 2018 at 6:05 PM
    #1
    KaptainH

    KaptainH [OP] Well-Known Member

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    So just finished breaking in my new gears and going to regear- The shop put in 75w-140 but I was thinking about going back to thinner stuff. However the G2 site and ECGS sites recommend the heavier stuff and non-synthetic. What y'all running?
     
  2. Dec 10, 2018 at 6:06 PM
    #2
    Clearwater Bill

    Clearwater Bill Sometimes when I close my eyes, I can't see.

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    Does the gearset have a warranty? And thus a lube requirement?
     
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  3. Dec 10, 2018 at 6:12 PM
    #3
    KaptainH

    KaptainH [OP] Well-Known Member

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    Yes, no
     
  4. Dec 11, 2018 at 7:25 AM
    #4
    Scott B.

    Scott B. Well-Known Member

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    My understanding is in our use, synthetic does not provide any real advantages.

    I change mine every 15K - 20K miles anyway - really no benefit for synthetic at that short of a change cycle. Much more beneficial to remove the dirt/water/contaminates.
     
  5. Dec 11, 2018 at 7:29 AM
    #5
    Tyler07

    Tyler07 Well-Known Member

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  6. Dec 11, 2018 at 7:32 AM
    #6
    zero4

    zero4 Metal Cutter

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  7. Dec 11, 2018 at 8:35 AM
    #7
    KaptainH

    KaptainH [OP] Well-Known Member

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    Yeah I ended up going with the 85w140 Lucas.. what about for your transfer case? Do you still use the Mobil 1 75w90?
     
  8. Dec 11, 2018 at 8:37 AM
    #8
    zero4

    zero4 Metal Cutter

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    Last edited: Dec 11, 2018
  9. Dec 11, 2018 at 8:52 AM
    #9
    Scott B.

    Scott B. Well-Known Member

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    I should have stated that I use Lucas brand gear oil.

    In the t-case, I just switched to Lucas synthetic. I debated between dino and synthetic - not sure it makes much difference here, either.

    I do think Lucas gear oil is better than many/most of the dino oils on the market.
     
  10. Dec 11, 2018 at 8:52 AM
    #10
    KaptainH

    KaptainH [OP] Well-Known Member

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    But you do use the 75w90 in the TCase?
     
  11. Dec 11, 2018 at 8:53 AM
    #11
    inesshell

    inesshell blah blah blah

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    140 in diffs and 90 in t case
     
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  12. Dec 11, 2018 at 8:56 AM
    #12
    Scott B.

    Scott B. Well-Known Member

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    Yes.
     
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  13. Dec 11, 2018 at 1:08 PM
    #13
    la0d0g

    la0d0g Its 4 o’clock somewhere

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    Lucas as ECGS recommends.
     
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