How to Find out if a Transmission Has Gone out

Park your car with its front tyres touching the curb., Try to pull off in 3rd gear with the front wheels at the curb, and without applying throttle., Find a smooth, straight road to test the vehicle.

5 Steps 1 min read Medium

Step-by-Step Guide

  1. Step 1: Park your car with its front tyres touching the curb.

    Engage 1st and start slowly releasing the clutch pedal without applying any throttle.

    The engine should gradually fade out and bog down when the pedal is completely released.

    If the engine just bogs down at some point, or the fading is not gradual, the clutch is damaged.

    If the gearbox grinds when you try to shift in first from a standstill, there's a damage in the clutch too.
  2. Step 2: Try to pull off in 3rd gear with the front wheels at the curb

    If the engine doesn't die, it shows a complete clutch failure.

    In that case, do not drive this vehicle. , Start from first, and slowly accelerate from second.

    As you do this use late-shifting, i.e. slightly over-rev the engine (approx. 500-1000 RPM faster than the revs you'd normally shift at).

    Up-shift to second without using double-clutching.

    Repeat the same procedure when shifting into 3rd.

    Now, with your car running at approximately 50 km/h (25 mph) try down-shifting to second without double-clutching.

    Both the up-shifting and the down-shifting must be done without grinding.

    Grinding of the gears indicates a gearbox malfunction, most likely in the sync gears ("synchronizers").

    To make sure it's the synchronizers, try up-shifting and down-shifting with double-clutching.

    If the grinding stops, then it's the synchronization.
  3. Step 3: and without applying throttle.

  4. Step 4: Find a smooth

  5. Step 5: straight road to test the vehicle.

Detailed Guide

Engage 1st and start slowly releasing the clutch pedal without applying any throttle.

The engine should gradually fade out and bog down when the pedal is completely released.

If the engine just bogs down at some point, or the fading is not gradual, the clutch is damaged.

If the gearbox grinds when you try to shift in first from a standstill, there's a damage in the clutch too.

If the engine doesn't die, it shows a complete clutch failure.

In that case, do not drive this vehicle. , Start from first, and slowly accelerate from second.

As you do this use late-shifting, i.e. slightly over-rev the engine (approx. 500-1000 RPM faster than the revs you'd normally shift at).

Up-shift to second without using double-clutching.

Repeat the same procedure when shifting into 3rd.

Now, with your car running at approximately 50 km/h (25 mph) try down-shifting to second without double-clutching.

Both the up-shifting and the down-shifting must be done without grinding.

Grinding of the gears indicates a gearbox malfunction, most likely in the sync gears ("synchronizers").

To make sure it's the synchronizers, try up-shifting and down-shifting with double-clutching.

If the grinding stops, then it's the synchronization.

About the Author

H

Heather Martin

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