I bought a 2007 S60R ended up replacing the TF-80SC Transmission, drove it home found out there was a Trans Cooler Line Leaking bought some O-rings that were not specific to Volvo stopped Leaking I drove 250 Miles and now Leaking Again is there any Certain O-rings I can buy at a Local Parts store that can work or do I have to go with the Volvo O-rings

 

While generic O-rings might do the trick temporarily, it's often best to stick with the specific Volvo ones for a lasting fix. They're made to handle the specific needs of your transmission system.