Having trouble shifting international with 10 speed... HELP!

i think your shifting at too low rpm. Try shifting # 1600-1800 rpm and i think you will do better.

 

What kind of motor? Cummins? Cat? Detroit?

 

Cummins responds quicker than Cat.

 

fast shifts in low range and a bit slower in high range.

It'll come, take your time and don't force them else you'll end up with a drive shaft on the road.

 

Try shiftoing at 1600-1800. Keep double cluching. Floating takes time. I have to cluch each time I get new truck till I learn it.

 

most shifts are approximately 500 rpm difference on flat ground at speed. keep that in mind. as you are new; keep double clutching, look at your tachometer when you shift. you'll get used to the sound of your truck; so in the future, you won't have to think about it; you'll know when you need to shift up or down.
if you are pulling a load; esp on a hill, you'll wanna be no lower than 1500 rpm, throttle up a touch and get it in the next gear down; as you won't need the full shift difference in engine speed because you'll start to lose momentum as soon as you aren't on the throttle.
keep at it; you'll get it soon