I've noticed that about 100 miles after installing a new clutch and new trans fluid/clutch fluid I get a grind going into 6th from 5th gear or from 5 to neutral to 6th. Feels almost as if it's getting too close to reverse. Any ideas?

 

Gear shift lever replaced correctly?

 

I just replaced my trans and on the old one it would grind but only if I redlined 4th (had no 5th) and then threw it into 6th. Not sure what's causing your grinding tho....