A place for more technical discussions. Please make sure you post in the correct section on the site, this way it keeps the site tidy AND ensures you get a more relevant answer.
The transmission oil cooler can be changed for a larger one, which adds cooling not only because of the bigger finned area but also because of the additional transmission fluid in the system required.
Rhino Ray has some experience running much bigger tyres on an auto, so he is perhaps the man to talk to.
My reading has led me to believe that the transmission fluid temperature is the key factor, so fitting a bigger cooler will solve all issues and make for a reliable auto transmission with bigger tyres.
Having said that, 215/75/15 tyres are not that big and with regular ATF changes you could be ok.
Kirkynut
The underdog often starts the fight, and occasionally the upper dog deserves to win - Edgar Watson Howe.
This makes sense for an auto running big wheels.
Considering my own usage which will be mainly road with occasional soft lane/field it looks like I will be looking for smaller tyres than the 225/70 on it at the moment.
Think I just need to decide between 195/80 and 205/70
