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Answered 2011-08-10 11:09:30

The technique for driving a vehicle fitted a non-sychromesh is to match the engine speed to the transmission speed by raising or lowering the engine speed.

The technique to change up is this:

  1. Depress clutch (not all the way to the floor, just enough to disengage)
  2. Move gearstick into neutral position
  3. Release clutch
  4. Depress the clutch once the engine has slowed the appropriate amount
  5. Move the gearstick into the higher gear.

The number of revolutions per minute to reduce depends on the normal gap between the gears (usually 600 to 800 rpm), whether the vehicle is speeding up or slowing down

The technique to downshift is

  1. Depress cluch
  2. Move gearstick into neutral position
  3. Release clutch
  4. Increase the engine speed by the appropriate amount
  5. Depress clutch
  6. Move gearstick into the lower gear

Again, the amount to increase depends on the transmission and vehicle acceleration.

There is no real substitute for practice.

If the speeds are not matched, the gears cannot engage, no matter how hard the gearstick is pushed.

If the gear does not engage, then the engine speed needs to be adjusted. Generally a high pitched grind indicates the engine is too fast, and a lower pitched grind indicates the engine is too slow.

If the gear cannot be engaged, the vehicle needs to be stopped as it is very dangerous to let a vehicle coast in neutral while the driver is hunting for a gear.

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The purpose of a clutch on a vehicle is to disconnect the drive of the engine from the gearbox (this would be required when the vehicle is stationary or to change gear). While the engine is running the crankshaft is continually turning, It is the crankshaft that turns the gearbox and via the gearbox the road wheels. Obviously there are times when the engine is running but drive is not required, The clutch is the mechanism by which this is achieved.

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Maybe the gearbox is broken, or the final drive, or a half shaft?

A typical drive train (rear wheel drive) : Crankshaft > clutch > gearbox > prop shaft > differential > drive wheels.

You will need to change the gearbox, swing arm, back wheel and, probably, brake arrangement and shocks.

i know how to do that but i will look it up OKAY.

You must remove the speedo drive gear to fill the gearbox.

Could be the tyres, differential, gearbox. wheel bearings

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Most probable cause is the drive cable between gearbox and speedo has broken.

go to a garage, u ain't gonna get this done on your drive!

You put the automatic in neutral, or put a dolly under the drive wheels.

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Check that the drive cable ends haven't rounded or the small drive unit where it plugs into the gearbox has not stripped, some are plastic.

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