I have a 1986 nissan langley exa (non turbo). the 5th gear engages and when i release the clutch the revs pick up but as soon as i press the gas pedel she kicks out of 5th gear and grinds the synchros. whats happened and how do i fix it ????
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Re: 5th gear doesn't lock
5th gear is gone, it'll be cheaper to find a good second hand one with a waranty than to get your one fixed sorry to say. The inside of gearboxes are only a place for gearbox specialists and they arent cheap unless you know someone.
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do they revs drop off when taking pressure off accelerator pedal when out of gear? if only staying high during gear change it would suggest a worn clutch friction/pressure plate so the engine isn't slowing down when clutch is depressed .I'd also have the OBD codes read to see if there is a sensor/switch at fault , but sounds like the clutch to me
Shift fork may also be one of the reason! watch the shift fork while moving the clutch in and out. 1)The shift fork is near the clutch master cylinder on the tranmission housing. you should now move the fork left and right while the clutch is moved in and out.2)From your query, it sounds to me that your clutch is not engaging and disengaging completely.3) This is due to the air block. Make a bleeding process to blow the air out!4)A broken shift fork will also prohibit the clutch from engaging/disengaging.
Common problem with EN471B is clutch bands failing. Same band for reverse and second gear. Any second gear problems? Possibly shifting directly from first to third? Drop transmission pan and check for bits of clutch band (non- metallic debris) to confirm.