Originally posted by: TurtleMan
let's say im going 80mph , then i downshit into 4th gear , and it rev up to like 4 or 5000 rpm my redline is 6000something
is it overreving ? sometime when i downshift, there is like a force of pulling me back all the sudden , it is like engine got stucked or something , so i don't know if im doing it right or wrong........
If you don't go above redline, you're definitely fine. Most cars these days have rev limiters that would save you from doing much damage anyway.
As for the "force" you feel, it's probably just they way you're shifting. When you hit the clutch, the engine drops back to idle speed and when you downshift and release the clutch pedal, the engine has to jump up to match the gear speed.
You can minimize or eliminate this by reading up and practicing double clutching.
In short, you normally:
Clutch
Downshift
Release Clutch.
When double clutching:
Clutch
Neutral
Release Clutch
"Blip" the gas pedal to rev the engine up to or a little above your target RPM speed
Clutch
Downshift to the appropriate gear
Release the clutch.
When you get good at this, you will be able to downshift without any "feeling." The only indication that you've downshifted is increased drag and the sound of your engine spinning faster.
Be sure to practice this stuff in a parking lot or something first.