Hi, I'm a little confused. I just put my 05 hilux in for a 120k service after purchasing a few months ago and had a heavy duty clutch fitted. Now when sitting on just over 60 with a slight bit of accelorator I get this weird hummmm and annoying vibration throughout the whole car. It wasnt there b4 and when I asked the mechanic he said it was a hormonic imbalance and he has no idea why or what could be causing it. The car seems to handle fine but I am still a little concerned. Can anyone shed some light on what this may be? Cheers Steve