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  1. Join Date
    Aug 2020
    Posts
    22
    #1
    i replaced the transmission oil of my isuzu mu-x m/t 2017 model with a 15w-40 engine oil and the result was that the shifting from 1st to 2nd gear and from 3rd to 2nd gear became rough. also a noise occurred during morning start-up is observed. the recommended transmission oil for this vehicle per manual is besco transaxle 5w-30. you may also use 5w-30, 10w-30 or 15w-40 engine oil per isuzu mechanic instruction.

    did you experience this?

  2. Join Date
    Nov 2009
    Posts
    3,522
    #2
    I'd follow the oil grade.

    15W40 is for Crosswind MSG5K trans, while axle oil is 85W140

  3. Join Date
    Mar 2008
    Posts
    54,625
    #3
    Quote Originally Posted by waldnerdoe View Post
    i replaced the transmission oil of my isuzu mu-x m/t 2017 model with a 15w-40 engine oil and the result was that the shifting from 1st to 2nd gear and from 3rd to 2nd gear became rough. also a noise occurred during morning start-up is observed. the recommended transmission oil for this vehicle per manual is besco transaxle 5w-30. you may also use 5w-30, 10w-30 or 15w-40 engine oil per isuzu mechanic instruction.

    did you experience this?
    i am curious.
    why not stick to the recommended oil grade?

  4. Join Date
    Aug 2020
    Posts
    22
    #4
    just curious also using thicker engine oil

  5. Join Date
    Jul 2014
    Posts
    1,261
    #5
    Hindi ba, usually kapag manual transmission gear oil GL-4, nasa SAE 80, SAE 75W-90, SAE 80W-90, SAE 90?
    Ung GL-5 ng Isuzu, 85W-140.
    Parang malayo ung 15W-40.

  6. Join Date
    May 2006
    Posts
    4,346
    #6
    Quote Originally Posted by waldnerdoe View Post
    i replaced the transmission oil of my isuzu mu-x m/t 2017 model with a 15w-40 engine oil and the result was that the shifting from 1st to 2nd gear and from 3rd to 2nd gear became rough. also a noise occurred during morning start-up is observed. the recommended transmission oil for this vehicle per manual is besco transaxle 5w-30. you may also use 5w-30, 10w-30 or 15w-40 engine oil per isuzu mechanic instruction.

    did you experience this?
    are you really looking at the correct box bro?
    bakit engine oil ang gamit sa transmission? usually mas mataas ang viscosity grade ng transmission oil.

  7. Join Date
    Nov 2009
    Posts
    3,522
    #7
    Same grade yung engine oil sa gear oil sa Isuzu. Transfer, rear, front axle ang nagkaiba.

  8. Join Date
    Aug 2020
    Posts
    22
    #8
    Quote Originally Posted by Gumusut_Amige View Post
    are you really looking at the correct box bro?
    bakit engine oil ang gamit sa transmission? usually mas mataas ang viscosity grade ng transmission oil.
    For 1st gen isuzu mux, pwede engine oil ang ilagay sa m/t ransmission. Ang Sae 90 gear oil ay sobrang lapot compared to 15w-40 oil

  9. Join Date
    Jul 2014
    Posts
    1,261
    #9
    Oo nga, thanks.
    Ang baba pala ng viscosity ng oil for Isuzu manual transmission.
    Dko pa nabasa ung part na yan sa owners manual, ang kapal kasi. D-Max ang sa amin pero pareho lang yta sa muX.screenshot_2022-06-21-19-22-50-25_e2d5b3f32b79de1d45acd1fad96fbb0f.jpgscreenshot_2022-06-21-19-23-34-05_e2d5b3f32b79de1d45acd1fad96fbb0f.jpg

    Sent from my CPH1911 using Tsikot Forums mobile app

  10. Join Date
    Aug 2020
    Posts
    22
    #10
    Quote Originally Posted by Mask Rider Blac View Post
    Oo nga, thanks.
    Ang baba pala ng viscosity ng oil for Isuzu manual transmission.
    Dko pa nabasa ung part na yan sa owners manual, ang kapal kasi. D-Max ang sa amin pero pareho lang yta sa muX.screenshot_2022-06-21-19-22-50-25_e2d5b3f32b79de1d45acd1fad96fbb0f.jpgscreenshot_2022-06-21-19-23-34-05_e2d5b3f32b79de1d45acd1fad96fbb0f.jpg

    Sent from my CPH1911 using Tsikot Forums mobile app
    Yes sir, 1st gen ba yung dmax mo? 2.5 or 3.0 ang displacement? Yung sa unit ko 2.5 ang dispcement, ang transmission is MUA5H

  11. Join Date
    Jul 2014
    Posts
    1,261
    #11
    Quote Originally Posted by waldnerdoe View Post
    Yes sir, 1st gen ba yung dmax mo? 2.5 or 3.0 ang displacement? Yung sa unit ko 2.5 ang dispcement, ang transmission is MUA5H
    2018 D-Max 4JJ1-TCX 3.0L, Sir.
    Hindi pa napalitan ng manual transmission oil at differential gear oil.
    I tried buying MT oil from casa kaso nasa drum, itatakal lang at ililipat ng ibang bote.

  12. Join Date
    Aug 2020
    Posts
    22
    #12
    Quote Originally Posted by Mask Rider Blac View Post
    2018 D-Max 4JJ1-TCX 3.0L, Sir.
    Hindi pa napalitan ng manual transmission oil at differential gear oil.
    I tried buying MT oil from casa kaso nasa drum, itatakal lang at ililipat ng ibang bote.
    ang tawag nila diyan sir sa tinatakal ay re-pack. wala kasing 1 liter na besco sa casa. yung repack ang binibili ko sa casa. wag kang bibili sa lazada or shopee na besco transaxle.

  13. Join Date
    Aug 2017
    Posts
    86
    #13
    Quote Originally Posted by waldnerdoe View Post
    ang tawag nila diyan sir sa tinatakal ay re-pack. wala kasing 1 liter na besco sa casa. yung repack ang binibili ko sa casa. wag kang bibili sa lazada or shopee na besco transaxle.
    Sorry for resurrecting the thread, pero bakit po wag bumili ng besco onilne? puro fakes po ba?

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rough shifting isuzu mu-x m/t 2017