I think it has plenty of cooling but I was worried to block it totally because that may be required if it was hot out slow speed and high rpms. I don't have a good answer for that. I was watching a bit on others. Have to keep in mind the number one killer on transmissions is heat over periods of time so it's not just the radiator either. Some have closed it and placed a fan as well that might be the ticket. Haven't seen any radiator temp complaints yet curious what others say