Thread: switch for transmission oil cooler fan

Ian, mine is fitted just to the right of the steering wheel column at the lower end of the dashboard. I guess it depends on your dash layout and what else you might want to eventually fit before making a firm decision.

Originally Posted by gavinwibrow

Ian, mine is fitted just to the right of the steering wheel column at the lower end of the dashboard. I guess it depends on your dash layout and what else you might want to eventually fit before making a firm decision.

Thanks for that. It sounds like where I would like to place it (lower position on the right hand side of the Binnacle. I recall seeing a post that said to use a cruise control switch but I cannot find the post .

So just wanted check if anyone had any particular suggestions if the cruise control switch is the one to use.

Yes, cruise control switch is an On/Off. Most of the others are just a momentary pulse when you press it and need a latching relay.

Regards Gordo Sent from my iPhone using Forum Runner

Hi Ian P
Any chance you would have any photos of your set-up?. Im about to fit a second cooler and just wondering why a fan is needed.

Originally Posted by Sleeping Wood

Hi Ian P
Any chance you would have any photos of your set-up?. Im about to fit a second cooler and just wondering why a fan is needed.

Hi Sleeping wood,

I do not have any photos but can explain what I did.

I used a Davies Craig combo cooler and fan plus a Derale 25792 thermostat Derale 25792 Derale Fluid Control Thermostats The thermostat was put in the return line to the transmission so that when the temp is below 82C the thermostat returns the fluid directly to the transmission.

When the temp is above 82C, after going through the factory fitted cooler, the thermostat directs the flow to the additional cooler and then back to the tranny.

I tossed up whether to put an in-line thermostat in to operate the fan, however I opted to run the fan manually from a spare cruise control switch mounted on the binnacle.

The installation is fairly straight forward with the only fabrication being that I had to make a couple of brackets to mount the cooler in front of the radiator.

Happy to take some shots of the installation and post them towards the end. of the week.

Cheers
Ian

I forgot to say WHY I put a fan in.

I tow a van and often when towing the van up long steep hills;the speed of the vehicle is not enough to get sufficient air flow through the cooling system to keep the transmission fluid within correct operating range.

With manual control of the fan I can put the fan on before it is really needed. If when driving at normal highway speeds or when I can maintain sufficient speed going up hills the fan will remain off.

Fans are cheap and I would rather have it there in case I need it rather than find the transmission temperature rising and me thinking 'I wish I had of installed that fan'

Cheers
Ian

Thanks for the link..... Just trying to get how you plumbed this up.... Pics would be great when you can upload... :-)

so that huge fan behind the rad wont pull enough air through to create some form of breeze?

and

at what speed is this a concern?

I tow up the Toowoomba range regularly and even at a regulated 40kph I reckon theres heaps of air