Hello Guys, maybe you can help me. My van Mitsubishi Star Wagod 4D56 engine seems to run only on third gear. Even if I switch on and off the Overdrive button. When I travel at 60 KPH it seems the is only in 3rd Co'z when the needle goes up to 60 KPH and above the tachometer seems to follow the speedometer. The van Revs high on higher speeds of more than 60. Is it normal? And another thing, how would you know if the turbo inter cooler is still working or not? Is there a good mechanic you know where I can get my van checked? Thanks. :