Some models with the manual transmission can grind while shifting up into fifth gear due to the misalignment of the fifth gear shift fork. The transmission will need to be removed, and fifth gear, the synchronizer sleeve set, and the fifth gear shift fork will need to be replaced.
Misaligned Shift Fork May Cause Transmission to Grind on Upshift on Honda Accord
Average mileage: 244,166 (180,000–325,000)
Drive Train affected: Manual Transmission
14 people reported this problem
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WHEN SHIFTING IN 5TH GEAR FROM 4TH AT HIGH RPM GEARS GRIND BUT DOESNT GRIND AT 1500RPMS OR LOWER
Grinds going into 5th gear. I have not fixed it. I just double clutch it and sometimes it helps and sometimes it still grinds