[97Stallion]

how fast are you going? Is this on the street or strip. In 4th at 4500, you're close to if not over 100mph depending on gears. But it could be you needing to hold the clutch in longer, or your syncros for the gear are going bad. That's an odd gear to go bad though. You must slam in to 5th alot.

 

[97Stallion]

It's s 2001 mustang v6 with 47xxx miles . I dont slam in into 5th gear alot i just drive it but i do get up on it every once and awhile. I installed a shorter shifter lever but its not a actual short shifter, its more so one of those smaller bolt on shiter arms. It doesnt happen to often just every once awhile.

I don't know what to tell ya. Can you feel if there any slack in your clutch pedal?