Hey Guys,

I have a 2000 Volvo S80 2.9 and its leaking from the reservoir and the hose connection. It has ATF in it right now (never been flushed) and I was thinking I should flush the system when I replace the reservoir and the hose.

Volvo says I should use ATF but I read that ATF causes leaks. I was thinking I should use Pentosin CHF 11S this time around. What do you guys think?

Also what is the best method to remove all ATF and replace with CHF11S? Several people just replace the fluid in the reservoir, drive for a while and replace again, but with this method there will still be some ATF in the system.

I read that it is bad to mix ATF and CHF 11S so I want to remove all ATF and replace with CHF11S.

Any input will be much appreciated. Thanks!

 

ATF is fine but you can switch to 11S if you'd like. To flush, remove the return line from the reservoir and put the end into a container. Fill the reservoir, start the car and turn the wheel back and forth and keep adding 11S until it comes out clean from the return hose. Obviously, it would help to have another person help with this.

 

I have a case of genuine Pentosin CHF11S that I'm not using. PM me if you'd like to buy some cheap.