rough shifting isuzu mu-x m/t 2017

**waldnerdoe** · June 21st, 2022 11:08 AM

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?

**12vdc** · June 21st, 2022 12:01 PM

I'd follow the oil grade.

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

**dr. d** · June 21st, 2022 02:33 PM

Originally Posted by waldnerdoe

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?

**waldnerdoe** · June 21st, 2022 03:43 PM

just curious also using thicker engine oil

**Mask Rider Blac** · June 21st, 2022 05:01 PM

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.

**Gumusut_Amige** · June 21st, 2022 06:53 PM

Originally Posted by waldnerdoe

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.

**12vdc** · June 21st, 2022 08:12 PM

Same grade yung engine oil sa gear oil sa Isuzu. Transfer, rear, front axle ang nagkaiba.

**Mask Rider Blac** · June 21st, 2022 08:29 PM

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.jpg

screenshot_2022-06-21-19-23-34-05_e2d5b3f32b79de1d45acd1fad96fbb0f.jpg

Sent from my CPH1911 using Tsikot Forums mobile app

**waldnerdoe** · June 22nd, 2022 07:06 AM

Originally Posted by Mask Rider Blac

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.

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

**waldnerdoe** · June 22nd, 2022 07:13 AM

Originally Posted by Gumusut_Amige

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