Shifting Gears Is Hard

Inspection procedure 3: Shifting gears is hard
DIAGNOSIS
STEP 1. Check the control cable
Q: Is the control cable in good condition?
YES: Go to Step 2.
NO: Repair or replace the control cable. Then go to Step 5.
STEP 2. Check for poor meshing or wear of synchronizer ring and gear cone.
Q: Is poor meshing or wear of synchronizer ring and gear cone found?
YES: Repair or replace the synchronizer ring and gear cone. Then go to Step 5.
NO: Go to Step 3.
STEP 3. Check the synchronizer spring for weakness.
Q: Is the synchronizer spring weakened?
YES: Replace the synchronizer spring. Then go to Step 5
NO: Go to Step 4
STEP 4. Check that the specified oil is gear oil SAE 75W - 90W or 75W - 85W conforming to API classification GL-4.
Q: Is the specified oil gear oil SAE75W-9OW or 75W85W conforming to API classification L-4?
YES: Go to Step 5 No: Replace the oil. Then go to Step 5.
STEP 5. Check trouble symptoms.
Q: Isn't the shifting of the gears hard?
YES: Return to Step 1.
NO: This diagnosis is complete.