for a gasoline engine, you'd generally want to shift no later than 2000-2500 RPM for the best efficiency, sometimes can shift lower depending on the vehicle. If you shift too early there'll be no power at all and the vehicle will shudder due to the engine rotating too slowly.
for a diesel engine you'd want to shift earlier because diesel's operate at lower RPM's than gasoline engines.
For most driving you also dont want to MASH the gas pedal hard (unless its something like maybe a geo metro then you'd need to push the pedal a bit farther)
(i am assuming a 5 speed manual transmission instead of something with more spaced out gears like a 'granny low' transmission in a 1980 truck with a low, first, second and third gear) but even in my '80 chevy i still shifted most of the time before 2500 RPM (from 1-2 and 2-3). I also had an 88ish Honda CRX Si that i could usually shift at about 1800 RPM. but most vehicles 2000-2500rpm is a good spot to aim for and above 55mph you should be in the highest gear.
stick shift or automatic
They are stick shift.
Bent shift tube or shift fork.
No not all coupes ate stick shift I have a 1992 accord coupe it was auto until I swapped it out to a stick shift
When driving a stick shift, you shift up as the engine begins to rev in each gear. You will downshift as the engine begins to slow.
Some are stick shift (newer ones are 6-speed) some are automatic.
You can buy a stick shift. You don't have to though. For the coupe, to get stick shift you'd have to buy the 6speed G37 sport coupe which is the most expensive out of all the g37s.
Stick shift, GetragAuto, A518Stick shift, GetragAuto, A518
Nothing, as the stick shift wasn't available in the Challenger in 2008.
If it has a stick shift and clutch, it is standard. If no clutch and stick shift, it is an automatic.
manual stick shift BMW what cause to shke when i change in to the first gear
With the stick pointing directly upwards.