bon en fait j'ai vu que les syncro pouvaient être bousillées mais sur le site de twm qui fait de très bons shifter (d'après les posts de nos amis quebequois) ils proposent d'y aller tranquille au début et ne pas bourriner dès le premier jour : ça peut être une bonne astuce voilà le texte en anglais (avis aux nixiens pour une traduc sympa)
lien pour shifter nx :
http://www.twmperformance.com/shortshifters/nissanshortshifters/nissannxshortshifters.htm. Is a short shifter damaging to my car or transmission in any way?
This is one of the most inaccurate myths present in the aftermarket industry today. A short shifter is in no way damaging to the transmission or any related components. It is worth mentioning, however, there is a period of time after a shifter is installed where some care is required in order to become acclimatized to the new part.
After a short shifter has been installed the time it takes to shift is reduced and the timing between your hand and your clutch foot must be adjusted. Some people install a short shifter and immediately proceed to shift as quickly and as hard as possible. We recommend that all of our customers take several days to become accustomed to the new shifter before they try any high-rev shifts or faster shifting. Once the timing for the new shifter has been adjusted there shouldn't be any problems shifting the car in any circumstances.
j'ai fait un tuto pour démonter le shifter : des intéressés?
et merci blinkers pour l'aide : ça m'a été utile.