im having an issue selecting 1st and 2nd on my 86 (4age adm t50)
this only happens on hot days, i'll go to clutch in and it wont engge in first or second. i've been turning off the motor to get it into first then starting it up again to get going. if i do manage to get it into 1st it feels crap going into second.
i've changed my clutch master recently, fitting a protex one which does the job but leaves no pedal adjustment room and my clutch pedal pick up point is really high. might try shaving 5mm off the pin so the pedal can have more free play.

clutch fluid does not feel too hot. gearbox oil is fine and i dont get a slipping clutch.never pops out of gear and selects gears fine on a cool day.
any ideas?