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gear oil question

Discussion in '1st Gen. Tacomas (1995-2004)' started by tsab916, Mar 15, 2011.

  1. Mar 15, 2011 at 8:27 PM
    #1
    tsab916

    tsab916 [OP] Well-Known Member

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    What weight gear oil do you guys use?

    - I just changed my rear end fluid today at work (did it while the bosses weren't around) and had one he'll of a time because I had no pump and the spare tire was in the way, so I ended up just using what we had in a 55gal drum which was 80w-140 only because it had a pump.

    Can anything happen to the diff if the gear oil you use is to heavy?
     
  2. Mar 15, 2011 at 8:48 PM
    #2
    tsab916

    tsab916 [OP] Well-Known Member

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    I think first gen uses 80w-90...

    My question is is there any harm in using a heavier weight gear oil?
     
  3. Mar 15, 2011 at 8:50 PM
    #3
    tvbd56

    tvbd56 Epic Member

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    i think it'll just be working harder because of the thicker oil
     
  4. Mar 15, 2011 at 11:37 PM
    #4
    Norton

    Norton Well-Known Member

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    Definitely a little thick for 1st Gens as well, since they call for 75W-90, SAE 90, and (in certain cold weather applications) 80W-90.

    Transfer.jpg
    Differential.jpg
     
  5. Mar 16, 2011 at 1:03 PM
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    derekp

    derekp giddy up!

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    MPGs and power will drop. I don't *think* anything will break...
     
  6. Mar 16, 2011 at 3:49 PM
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    tsab916

    tsab916 [OP] Well-Known Member

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    Yea...im just gonna run the 80w-140 for a few days to I guess rinse the diff and change it to 80w-90 later....thanks for the inputs guys
     
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