I’m having a problem shifting gears when the Ranger is on. The idle is high 1300-1400 rpm. When the Ranger is off I can shift gears like normal. So I have turn it off to put in gear then turn back on. I’m new at this, don’t know where to proceed, I’ve checked all the easy things like water in air filter, spark plug, even took clutch housing off to see but everything seems like what I think supposed to. Any similar cases?