since quite some time my car has some shifting moods with increasing incidence.
by shifting moods i mean that i experience some problems with shifting gears.
the predominant thing is shifting down, from 4th to 3rd and 3rd to 2nd while driving and slowing down.
at those moments i cannot get it in the previous gear and i feel very much resistance. i feels like i haven't placed the shifter correctly into position but i certainly have.
sometime i can force it into the gear but that just doesn't feel right. other times i put the gear in neutral, release the clutch and kick the clutch back in and most of the times it does get into gear after a attempt like that(but i have already lost a lot of speed and time). sometime i even have difficulties getting it in 1st gear with the engine running from neutral. it rarely happens when shifting up..
as the title says, this happens with moody fluctuations. it doesn't happen until after some time of driving and is dominant halfway the drive and comes with moods during each trip.
another curious fact: i usually leave the car in 2nd gear when parked and when i start up the engine again(with clutch kicked in) i feel a hard bump coming from the back at the moment i turn the key. i also have some difficulties putting the car into reverse gear and often have to release and kick back in the clutch to get it into reverse.
has anyone experienced the same before of have any idea what can be the problem?

(bad transmission lubrication? displacement of engine into the gearbox? about a year ago i fitted a new linkage of the shifting rod into the gearbox so i don't suppose the problems lays into the linkage into the gearbox, but who knows..)
i hope you folks could help me out.
