hi all. i was wondering if buying poly mounts for my trans and engine would help alleviate my grinding into 3rd. i never used to grind third when i shifted fast when i first bought my stang but the more i drive it the worse it gets. im good at manual but idk what to do sometimes it grinds when im not even shifting fast. im not doing anything weird. could my syncros be going? i can hear them whine when i shift to third. any response is appreciated