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What fluid/oil to use in a NP205

Discussion in 'The Garage' started by adamforsythe, Jul 18, 2006.

  1. adamforsythe

    adamforsythe 1/2 ton status

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    I will be FINALY installing my NP205 at the end of next week. I have been told I could use ATF or gear oil in a NP205? I would like to use the ATF just incase it started to leak back into my tranny. But I don't know if I would trust ATF in a NP205. What would you guys use ATF or Gear oil?
    Thanks
    Adam
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Gear oil. Been discussed literally thousands of times. Do a search.
     
  3. wazzabie

    wazzabie 1/2 ton status Premium Member

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    When I got my NP205 it had tranny fluid in it. I'm not sure how long it had it in it but it runs OK. I took out he tranny fluid and put gear oil in it. I guess tranny fluid might save some mpg
     
  4. SchnorrCS

    SchnorrCS 1/2 ton status

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    If I recall correctly, teanny fluid goes in a 208. You sure it's a 205?
     
  5. adamforsythe

    adamforsythe 1/2 ton status

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    Yea a few people (On this board) have said that you can use tranny fluid. But i'm going to do what I was going to do all along and use gear oil.
    Thanks
    Adam

     
  6. 1977k5

    1977k5 3/4 ton status Vendor

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    If you have an auto, I would go with ATF in the t-case. If you have a manual, run 80W-90. The 205 will run fine with either but you don't want to have two different fluids in case you run into a leaky seal.
     
  7. 79k20350

    79k20350 3/4 ton status

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    theres a search button, use it...:rolleyes:

    Gm used both atf and gear oil in 205's
     
  8. BizeeB65

    BizeeB65 1/2 ton status

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    x2 on the search button.

    I personally have asked this question before.

    I run ATF.
     

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