Oct 13, 2015 I get a growling sound when accelerating at anywhere above about 50% throttle. I can't ... SwedeSpeed - Volvo Performance Forum banner ... It's like a completely separate noise starts, over top of the engine and transmission noises. ... PAST:2000 S70 AWD,2000 S70,2006 XC90 Ocean Race,84 240 Turbo. Oct 19, 2016 XC90 d5 2004 loud growling growling noise while driving XC90 '02'15 General. ... when driving below 40mph the acceleration sound really loud very growly grownny sound on .