Overheating Transmission, Pajero 2008-2020

[Lakshmi Narasimhan]

Just now, jeetu sharma said:

Sorry for all the questions...but since you have fixed the fan can you recommend a garage and if cost estimate. I see AED250 from a garage in Sharjah

Can you pls whats app me on 0559323959

1 minute ago, jeetu sharma said:

Sorry for all the questions...but since you have fixed the fan can you recommend a garage and if cost estimate. I see AED250 from a garage in Sharjah

Chinese one is 250, Taiwan one is 500. I went in for Taiwan one, not much sound compared to Chinese one.

[Lakshmi Narasimhan]

Last week I tried driving on automatic mode for 5 min that too around 7 AM and had overheating problem with 2 auxiliary fans running. So this is a never ending problem with pajero, need to drive only on manual mode and always 👀 pop out looking into gauges!!!!

[Lakshmi Narasimhan]

On 5/18/2021 at 11:53 AM, Lakshmi Narasimhan said:

Last week I tried driving on automatic mode for 5 min that too around 7 AM and had overheating problem with 2 auxiliary fans running. So this is a never ending problem with pajero, need to drive only on manual mode and always 👀 pop out looking into gauges!!!!

It was the fan which I install got worked sometime and doesn’t sometime as it got struck with some dirt, when that was cleared and fan running properly theres no overheating problem for the last 4 drives even on steep climbs. Pretty much relaxed now.

[Jeetu Sharma]

Thankfully even I did not have any issues on my last drive. I used 4HLC and tiptronic. I guess the key was to ensure minimal gear shifting (I made sure I maintain 2nd gear and kept an eye on the RPM as well). Since the drive was relaxed without steep climbs (only exception was Pink Rock  ) that helped too.

I'll need a few more drives to further solidify my stance. @Lakshmi Narasimhan Good to know that the fans are helping. I will keep this in mind for future updates.

 

 

 

[MANOJ NAIR]

I had the issue of transmission overheating in my initial drives. But recently I added one more oil cooler added ( as per advise of mechanic). My last drive I didn’t have any issue. Need to wait and see in more drives if it occur again.

 

 

[celoalvarado]

Hello friends! User from Costa Rica here, I own a 2018 Pajero 5 door, which is giving me a big headache. It overheats when going uphill, driving in D or Tiptronic does not make a difference. Driving 2WD or 4WD is the same result.

I notice when it starts overheating because the A/C starts getting hot, then the needle in the gauge goes over the middle line. When I start going downhill, it regulates and all fine. 

I have already changed to a bigger radiator, new fan clutch, new thermostat. 

I'm planning to do the bigger transmission oil cooler and aux fan for it, what do you recommend?

THANKS IN ADVANCE!

[Frederic]

9 hours ago, celoalvarado said:

Hello friends! User from Costa Rica here, I own a 2018 Pajero 5 door, which is giving me a big headache. It overheats when going uphill, driving in D or Tiptronic does not make a difference. Driving 2WD or 4WD is the same result.

I notice when it starts overheating because the A/C starts getting hot, then the needle in the gauge goes over the middle line. When I start going downhill, it regulates and all fine. 

I have already changed to a bigger radiator, new fan clutch, new thermostat. 

I'm planning to do the bigger transmission oil cooler and aux fan for it, what do you recommend?

THANKS IN ADVANCE!

Hi @celoalvarado!

The overheating issue mentioned in this post above is related to the transmission overheating, while yours looks like the engine is overheating. This should definitely not happen on a Pajero.

You have approached it correctly by replacing the radiator, fan clutch, and thermostat. Another possibility could be perhaps the water pump that is not circulating the coolant properly.

I don't think a bigger transmission cooler or aux fan will help here. There seems to be a different reason why your engine is overheating. 

I you changed the thermostat and radiator recently, are you sure there is no air left in the system? You can check in this way:

1. Start with engine cold → remove radiator cap
2. Fill coolant to the top of the radiator.
3. Start engine with radiator cap off.
4. Let it idle and watch for:
-Air bubbles coming out
-Coolant level dropping

Once:
Bubbles stop
Engine reaches operating temp
Coolant level stabilizes

5.Then put the cap back on securely.