ok. shifting a slick shifted trans is like driving straight cut gear trans. you have to double clutch on up shift and down shifting!!! this lets the gears mesh and be at same speed , so will go into gear easily. on down shifting, you shift to neutral, let clutch out rap the throttle a little and push in clutch , trans will go into gear without grinding !!! I learned this driving a 1948 GMC truck back when I was a teenager. without grinding gears!!!! it's not rocket science. BTW, I shift my jerico this way, never grind gears!! when racing, , it's full on, power shifting. no letting up. no , you don'y have to come to a stop to down shift. can do it rolling.
