I took mine out to minimize the risk of running coolant instead of atf in my new tranny. not sure it was a good idea though, since its been deleted it definitely runs alot warmer especially in traffic. locked up is no problem but traffic and just driving around town is a killer especially in the summer. I put a dearle cooler and fan up front but even that doesnt seem to help much. might have to start looking into a bigger cooler.