Hi all, This is a weird issue I'm experiencing on both rFactor 1 & 2 from the day I started to play these sims : When someone is behind me and closing on me I have a strange effect added to my car, like if the car behind me was "pushing" me even though the car is, say, 50 meters/yards behind me. This results at best in a sudden massive understeering of my car, or shaken all over the place and hard to handle (this is usually the way I know a car is closing on me), or in the worst case spinning. When I drive in a packed field with a car right behind me I usually don't experience that behaviour, like if a car being in my slipstream zone couldn't affect me. Okay, so as a picture is worth a thousand words, this is what happens to me, sort of : The "bubbles" around the cars are their "slipstream zones". I know/guess it's not like that for real but you can better understand that way the issue I have. It happens online and offline. It *might* be worst with AI than online. Config : AMD Phenom II 965 x4 8GB RAM Switched from a Logitech G25 to a Thrustmaster T300RS, still the same Switched from a ATI radeon hd 6570 1GB vRAM to a AMD radeon rx 550 2GB vRAM, still no joy Video output on TV screen 42" 60Hz (vSync or not, no difference, but a bunch more fps without) Dx9 (Dx11 crashes rF2 for me BTW) (Changing steering wheel and graphic card wasn't related to the issue, but you can rule them out as a possible cause of it I believe) Had anybody experienced the same problem ? Could it be related with AMD not copping correctly with multithread inputs ? Does someone know how to fix it ? Any idea, clue, input, solution is welcome and much appreciated.