if the engine isn't reved enough it will stall
The reason for the engine to shake and rattle when changing gears could be one of three things. 1. you just don't know how to drive and need to be more smooth when changing gears. 2. Your clutch may not be fully released thus you are just a bad driver. 3. your tranny is shot and a new one is recommended.
It disengages the engine from the driveshaft allowing you to shift the gears on your transmission.
you need a clutch that's all
Not enough information. Will the car shift gears with the engine off? Is the gear shifter stuck in one particular gear?
The tectonic plates of the earth shift and move. They overlap and collide with each other which makes the earth shake!
You should shift to keep the engine RPMS as close to max horsepower output as possible. I.E. If your car has a redline of 8,000rpm and makes 250hp max at 7,200rpm. If you have gears that make a 1000rpm difference between each shift and you had a completely smooth powerband, then you would shift at 7,700rpm, because any higher and the engine is producing less power than the next gear would provide. Hope that helped, its a hard subject to explain without physically showing you on a dyno.
I have a 2001 sporster. I usually shift at or alittle above 3000 rpm. Any thing lower puts my rpm at or under 2000 in the next higher gear, which makes my engine labor. I use my tac to shift and have never noticed the mph.
Is it an automatic or standard? automatic and fluid is not pumping when engine is running
Your truck may not shift gears because the transmission sensor is damaged or broken. It also may not shift gears because the transmission or linkage is damaged.
my merucry mystique dont shift gears fast
They start when the earth's plates shift, they are underground and when they shift they begin to vibrate which makes certain areas shake, so in a sense they form underground.