2001 ZX3 MTX75: Difficult to engage and disengage gears while automobile's on, but easy to shift when automobile is off. With vehicle off, I engage into any gear, then ignite engine, clutch applies fine to the gear selected, vehicle moves normally, but of course difficult to disengage. As assumed, if forced, gear grinds. Also, burning smell ensues. Anyone be as so kind as to give me their thoughts on what this may be before I dismantle and inspect everything?