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Transmission Oil Cooler.
I have a series 4 2005 3 litre auto and tow a large van. Looking at previous posts it is divided to fit or not to fit an external oil cooler to the auto and is a decision I will have to make. My question is. I followed the auto lines and it appeared to me they enter and exit the bottom of the radiator and return to the box. The oil cooler at the front of the radiator is connected to the power steering pump and not the auto box as some are led to believe. Correct me if I am wrong ?


My son just had an external transmission oil cooler fitted to his BA falcon as the internal cooler line in his radiator split and the oil and water mixed causing the box to fail. New box fitted and the line bypassed into an external cooler. Food for thought.
David
 

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Definitely food for throught. I have been enquiring about my auto cooler system. I have 4 trans coolers in total. 1 under the car, 1 next to the radiator, and 1 in each end tank of my PWR radiator.

Thats alot of lines and coolers to fail. Gave PWR a ring and they recommend their (single) 280 x 250 trans cooler with an 11" spal fan to replace all of mine. $330 in total. Very cheap - and will be just as effective as the ones I run now.

Thats a bummer about the falcon. Something so simple in an (aparent) separate system can cause massive damage in another system.
 

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davekaren33 you are right.

Most maufacturers run a small cooler at the bottom of the radiator for the gear box. It's just a matter of plugging the cooler in the radiator and installing a separate cooler with new lines to connect to your auto box. Not a hard job, just gotta find somewhere to mount it.
 

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shame you didnt read my post earlier re- trans coolers, I used my BA as an analogy. Anyhow at least your boy has sorted and eliminated the nasty prospect of premature gearbox failure.

Any car that tows increases the heat in the trans fluid considerably and thats why it is such a small price to pay to have a big stand alone cooler. Ask anyone its heat that kills transmissions.
Trans coolers are cheap as chips now and certainly worth fitting. Fitted one to my auto Shorty years ago when its trans failed and everything about it was better afterwards including less heat radiating from the trans tunnel so it must have been helping the inards of the box no-end.
 

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davekaren33 you are right.

Most maufacturers run a small cooler at the bottom of the radiator for the gear box. It's just a matter of plugging the cooler in the radiator and installing a separate cooler with new lines to connect to your auto box. Not a hard job, just gotta find somewhere to mount it.
When questioning several mechanics about this, majority suggest mounting a cooler before or after it enters the bottom of the radiator, it runs through the bottom of the radiator to warm the fluid, as trans needs some heat to operate correctly.
 
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