Also, it's possible that the clutch could be glazed. It will feel like it's slipping and you won't be able to lay tire or chirp the tires and if you try, you will certainly smell the clutch.
When shifting hard from first to second it will certainly feel like it's not catching, but slipping. If the clutch is glazed, 100-200 miles of normal driving will fix this problem. I've glazed my clutch twice in two years. Each time, it has gone back to normal.
to determine if your clutch is slipping, go in a parking lot and get your car up to a low speed, then engage 5th gear. your car will either keep moving forward sluggishly or your rpms will shoot straight up. if the rpms shoot up, then your clutch is not grabbing.
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