Try adjusting the clutch. Never downshift to slow down, press the clutch and use the brake to slow down it will save your engine and clutch. Downshift to pass or to rapidly speed up but be sure to have the revs up higher than when you were in the higher gear.
A bad transmission gear can cause your 1999 Nissan frontier to shift hard. Low transmission fluid can also cause the transmission to shift hard.
Shift Cable
Bent shift linkage Frozen shifting linkage - try lubricating
if it is hard to shift, when you shift your hear grinding, if you need to push really hard to get the clutch down, or if your in nutraul and your car dies when your foot is off the clutch
Check on the bottom side of the transmission for a plug that may have came unplugged. It will make it shift really hard if it is unplugged.
Not that hard I learned in 15 minutes. Clutch shift.......
the shifter lock need to be lubed to override the shift lock press hard on the brake and move shift over to unlock and pull down this will override it but not fix it remove shift covers and lube shift lock and should be fine
Because to press a button to shift a button is like pressing shift to press hard.
fluid braking down
Backwards to the current standard. Neutral then down for 1 down for two etc. It was my first bike and I had a hard time learning my second.
when it is worm you got to keep the throttle down to start
low flouid or bad trany.