E36 318i M43 1997Hi, still a newbie with E36. driving it for 1 month already and ive got few problems, thanks in advance for any helps.1. Gear sign came out and transmission jerks once enter and exit 3rd gear, though this problems come andgo. Do i just have to change transmission fluid? Or there is something wring with my gearbox module or the gearbox it self.2. Every morning, every now and then. the engine's timing is unstabble. Sometimes it goes down below 500RPM for few seconds and dies off. Ive ask few people, it might be the Air Flow Mass. It would cost RM350 to RM450 from kedai potong, RM800 plus from aftermarket. Not even sure which one is the best.3. Aircond off for few minutes and back on whenever it wants??4. High pitch whirring sound whenever depress the fuel pedal. The sounds seems to be coming from the alternator and belts area.5. Hitting sound from rear absorber. Also it comes and go.I think no. 1 and 2 is crucial for me to do first, but i didnt now where and how much for it. And, getting merried soon, lots of budget going there.