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Hard Gear Shifts in a Manual: One Gear or All of Them?
The pattern here — one gear versus every gear — points to two very different repairs.
The symptom
Noticeable resistance when changing gears.
What's causing it
Low clutch fluid or cable tension, or low/dirty transmission fluid, can affect all gears. Trouble with just one gear usually means synchro wear.
What to do
Check clutch fluid level and transmission fluid condition first. If only one specific gear is affected, that's synchro wear and needs a gearbox specialist.
Describe your exact pattern to the GetAutoSure AI Mechanic.