Hi my Flex started to act like the transmission was slipping so I took it to the Ford Dealer at home and they said the transmission oil cooler was leaking. The estimate for the repair job was $550. I was wondering if this seems about right or is it a little high. Also is this something I could replace myself. I just had the seal replaced to the electrical connector that cost me 450 dollars. I am going broke on this one looks like. Any help or advice would be greatly appreciated.