Transmission rebuild

[Obdulio39]

so i rebuilt my trans. All synchros and 2d gear. 3d used to grind (that caused the rebuild). Now the tranny seems tight and 3d gear wont downshift from 4th. Any ideas?

[Nanonevol]

Third gear used to grind but you replaced second?

[Obdulio39]

Yes. 3d gear was ok. But the synchro was bad. 2d gear was bad but the synchro good. Now all gears work fine but i decided to change the oil from gl-4 (80-90) to gl-1 (as recommended) and after 60 miles of driving the oil came out with a lot of glitter (wear from synchros). Idk if the lucas oil i got was bad but i can only hope the synchros still good.

[MattVAS]

I'd say give it a little time. A freshly rebuilt transmission can be a bit tight.
Also, how high are your RPMs when you're downshifting. These transmission aren't known for liking a high rev down shift.