I have to let the RPM's drop to about 2000 when im going to shift into 5th. Can it be my clutch or is tranny problems. The car is a 96 with 120,000 miles on it.

 

Na not ur clutch sounds like the syncros in ur tranny are worn. Not really a big deal you can try a syncromesh transmission oil they usually do a good job of taking away the grinding and extending the life of your syncros. GM Syncromesh is the most well known ther are a couple other companys that make it.

 

Swap your tranny fluid out, change it with Honda MTF with GM syncromesh and it will eliminate your grinding.

 

wouldn't redline work to temporarily remove grinding?

i believe redline would be better then gm syncromesh