1 > 2 Yep, occasionally like that here from memory. Although not in the last few days! I wonder if it has something to do with temperature? I recall my 200sx being notchy/crunchy between 1 > 2 until the gearbox oil had warmed up. It’s been reasonably warm over the last couple of days. Will see what happens when the temperature starts to drop.
Managed to do a couple of 4th > 5th shifts this morning >4000rpm - nothing! No crunch and smooth so it’s going from 1/2/3 > 5 @ >4000rpm.
I also did a shift from 3rd > 4th > 5th without re-engaging the clutch in-between (so depress clutch, go from 3rd to 4th, then straight into 5th, release clutch), again smooth with no crunch.
So it’s going direct from 1/2/3 > 5 that causes the problem.