22-06-2022, 03:05 PM
The comments re double declutching are all very relevant when on the move. However, my understanding of the original post is that there was difficulty engaging gears when stationary and idling.
In this situation the propshaft and output shaft aren't turning, and the input (first motion) shaft and layshaft shouldn't be turning either, assuming the clutch is fully disengaged and you have waited a few seconds for any motion to stop. The idling speed and the gearbox oil level and grade will determine how long you have to wait.
You now have the situation where the gear "speeds" are matched, i.e. they are both zero. Most of the time it should now be possible to move the gear lever and select any gear. Occasionally you might hit an unlucky spot where the teeth on the relevant two gears (or the dogs in the case of top gear) just happen to be almost in line and won't slide into mesh, in which case you need to bring the clutch pedal up and down briefly and wait again for input shaft motion to cease. With luck the gear teeth will now be in a better position to allow meshing. If you hear crunching as the gears are selected when stationary, it means that one gear is still turning, normally due to the clutch not fully disengaging i.e. clutch drag.
This article might be of interest: http://www.da7c.co.uk/technical_torque_a...arbox.html
In this situation the propshaft and output shaft aren't turning, and the input (first motion) shaft and layshaft shouldn't be turning either, assuming the clutch is fully disengaged and you have waited a few seconds for any motion to stop. The idling speed and the gearbox oil level and grade will determine how long you have to wait.
You now have the situation where the gear "speeds" are matched, i.e. they are both zero. Most of the time it should now be possible to move the gear lever and select any gear. Occasionally you might hit an unlucky spot where the teeth on the relevant two gears (or the dogs in the case of top gear) just happen to be almost in line and won't slide into mesh, in which case you need to bring the clutch pedal up and down briefly and wait again for input shaft motion to cease. With luck the gear teeth will now be in a better position to allow meshing. If you hear crunching as the gears are selected when stationary, it means that one gear is still turning, normally due to the clutch not fully disengaging i.e. clutch drag.
This article might be of interest: http://www.da7c.co.uk/technical_torque_a...arbox.html