I have Suzuki alto 2016 with manual gearbox. (Small car with 1.0 liter engine with 3 cylinders)
Sometimes, not always when I start moving in first gear at the moment when the engine speed equals the wheels speed (the moment when I need to release the clutch) I feel and hear a very strong shock in the whole car.
The strange thing that months can pass and it may not occur again. It mostly happens if I drive in a hilly area, but it doesn't end until I give the car a rest with a shutdown engine.
What do you think it could be?
I think if these were the motor mounts I would experience the problem regularly.