Automatic Transmission

Hello friends,
The heater core of my 306 XR vehicle has changed and the master gearbox cooler is not working. I also searched on the internet and took a picture of the cooler under the battery. He said that even if some master does not work. What is the necessity? I bought my car at 80k km 6 months ago. So far transmission gear and solenoids have not changed. My gearshifts are a bit knocked down. There is no (snow-sports) light burn, if I still replace the gearbox oil?
Do you think the cooler I think is the same as the partner cooler?

What if the logic is not working or if it is unnecessary, why would the guys produce this gear, if the guys who produced the car were unnecessary but act with the logic of this car, wouldn't you sell this car?

Thanks to your interest, as far as I understand, if you are going to use it in short places, you may not need a cooler. But I agree that it works.
Is this part I marked the same as the partner? It is sold for 100 TL as partner part. When we say 306 gearbox refrigerators 600tl :(

I gave the shape I wanted to the old gearbox :)

Friends who know I'm not sure about the parts will help, I hope it will be settled at reasonable prices

mrb brother I am a gearbox master, the reason for the knocks is that the coolant is not active, the friend before you had experienced a cigar about the gearbox, probably because the cooler is blocked. If you eat fat circulation will be poor

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