2ZR Turbo Yaris

[tmontague]

Nice work! How do you plan in mounting the trans cooler? Also how will you be wiring your trans cooler fan, thermostatically controlled?

[06YarisRS]

Originally Posted by tmontague

Nice work! How do you plan in mounting the trans cooler? Also how will you be wiring your trans cooler fan, thermostatically controlled?

The cooler is secured at the top very solidly with the rubber coated P clips. They do a great job of holding it tight. I just have to fab up a couple small brackets for the bottom. I'm on the fence about the electrical. I was planning on just wiring it to the rad circuit but I know it's not ideal. I would love to have it separately controlled with its own thermostat but that would require a lot of additional plumbing, sensor port, relay etc. An engine oil cooler with fan wired to the rad fan makes sense to me as oil temp and coolant temps are reasonably close, but I expect trans fluid could get very hot before the coolant gets to the point where it commands the fan to turn on.

I was speaking to a transmission tech yesterday and he felt that wiring it to the rad fan is a viable option as most trans coolers sit in front of the rad. Not really sure what to do at this moment.