I recently bought my Yota and it is over heating. The previous owner Pulled the stock fan assembly and mounted a electric fan. I am pretty sure that it is not big enough. Should I replace the electric fan with the stock part and What are your thought about mounting a transmission cooler as well.

 

Stock fan works best. An electric has to be insanely powerful to even come close to the cfm of a manual fan.

 

I would go back to the stock fan. And if you can I would try to find a shroud for the fan so it directs the air better