5spd swap problem

[average joe]

Ok,,so i just got threw doing my 5spd swap on my 92 240sx. Everything went fairly smoothly. All the parts came from another 92 so there should be no problem with compatibility. a new clucth set went in with the install. The clutch line was bled and trans case was filled with approx. 2.5qts of 80w90 hypoid c gear oil. Everything went fine for first a 15min test run across town, and then another 30min ride to my friends job(where the car still is). during the first ride, no problems. Smooth operation at any speed and good clutch operation. I let the car set for about 15min inbetween runs. Then the second run it did fine the whole run as well. No funny noise gear grinds or funny clutch operation. I went in, stayed for about maybe 5min and when i came back out to leave it won't go in gear(no grind,it just won't let you into the gear slots). I had someone work the clutch for me, and the slave is still getting as much travel as it was originally, so i don't beleive the problem is there. I'm kina stumped here. Any ideas would be much apreciated.

[average joe]

I just went back to further investigate and the car would shift fine. I suspect it to be the wrong fluid. I'll find out tommorow

[average joe]

ok,, so i changed the fluid to just a standard 75w90 today and everything is fine. Hypoid=bad

[average joe]

i'm glad i could help me out here.bump