Question:
My study manual says:
When down shifting: increase rpm
When up shifting: decrease rpm
I though it was the opposite. Can someone please explain?
Thanks

Answer:
The tranny in a truck is not synchronized, when you downshift, such as on a hill, you need to raise the RPMs to match the engine speed needed for the lower gear.
The easiest way to illustrate it is to downshift in your car, if you go to a lower gear in the car (say 4th to 3rd ) the rpms raise to maintain the same speed. In a truck YOU have to raise the RPMs as the truck won't do this for you.
The reverse is true upshifting, the higher gear allows to engine to turn at a LOWER RPM to maintain the same road speed. When shifting a truck you must allow the RPMS to drop to match the engine/road speed.
Answer:
When you shift you need to do it progressively. Most trucks shift between 1000 and 1500 rpms. So when your tack gets to 1000 rpms, it is time to down shift, at 1500 rpms. it is time to upshift. There are some trucks that shift between 1500 and 2000 rpms. this is basicly due to the different engine and transmission manufactures specs. So if your griding on the up and down shifts, your out of the sweet spot, increase your rpms. by 500 and you will be back in the progressive shiting zone.
Catch you on the flip!

Answer:
The link below should help explain it.
Progressive Shifting