Gearbox oil

Discussion in 'Problems, Fixes, Tips...' started by AFR0N1, Nov 14, 2019.

  1. AFR0N1

    AFR0N1 Copenworld Regular

    Joined:
    Mar 22, 2018
    Location:
    East Midlands
    Car(s):
    Daihatsu Copen L880K (KMVZW)
    Owners manual says either GL3 or GL4 oil can be used and it should be 75w90 and 2.1-2.25L is required.
    Question is what is the best gearbox oil to use for the 659cc Copen?
    And
    Can GL4+ be used? (reason for asking is Castrol Syntrans Transaxle 75W-90 was recommended but it is GL4+ rated and the description says it is compatible with GL4 but I want to know for sure)
     
  2. Salieri

    Salieri Copenworld Veteran

    Joined:
    Jun 19, 2012
    Location:
    Germany
    Car(s):
    Used to have a White Copen, but I sold it in 2023
    You have already answered your own question. Use Castrol Syntrans Transaxle 75W-90.
    It is specified as GL4, the + is a marketing term used to indicate a higher amout of extreme pressure and anti wear additives.
     
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  3. AFR0N1

    AFR0N1 Copenworld Regular

    Joined:
    Mar 22, 2018
    Location:
    East Midlands
    Car(s):
    Daihatsu Copen L880K (KMVZW)
    Thanks
    I was wondering what that + was about
     
  4. welz

    welz Copenworld Regular

    Joined:
    Jun 8, 2015
    Location:
    Leverkusen, Germany
    Car(s):
    copen 2003
    AFR0N1 likes this.
  5. AFR0N1

    AFR0N1 Copenworld Regular

    Joined:
    Mar 22, 2018
    Location:
    East Midlands
    Car(s):
    Daihatsu Copen L880K (KMVZW)
    I changed the fluid and it went well. Gearbox feels a bit smoother then it did before (might just be in my head)

    I didn't have a long extension bar to be able to reach the fill plug through the wheel well, but I did have a pretty long spanner and I could just reach the fill plug from the engine bay and I could remove the drain plug if I crawled under the car with it raised up.

    Here is the part number of the gasket for the drain and fill plug incase anyone needs it:
    90044-30178-
    DSC_0925.JPG
     
    Last edited: Dec 12, 2019
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