A833 Can't Downshift / Poor Performance

Hey Guys,

I am having a lot of trouble with a rebuilt ("rebuilt") transmission I bought. The trans shifts into gear just fine when idling in the driveway, and is marginal on upshifts (minor clash), but I can't for the life of me get this thing to downshift into gear while the car is moving.

I read through a lot of posts on here, and so far I've:
- Pulled the trans, inspected the clutch, cleaned/greased the input shaft,
- Tried 3 different fluids; ATF, 75-90, and 85-140 (no real difference)
- Checked the clutch disengagement (I can spin driveshaft by hand with clutch in, car in gear)
- Ordered new shift rods and arms, installed, and adjusted the shifter perfectly.
- Adjusted the stops on the shifter
- Checked the pilot bushing for binding (it is perfect and new)
- Checked the throwout bearing
- Pulled the side cover - shift fork for 1-2 had some minor wear on it, and reverse gear was a bit chewed (not from me), but nothing absurd. Actuated the shift collars by hand and it all seems to jive just fine.

Is there anything I am missing that I can try here?

*** Not that it matters, but I did try to order a rebuilt one from Brewers, but unfortunately they were backed up until September (when I called in March) and I wanted to drive the car this summer.

Could be a lot of things. It was definitely not "rebuilt" correctly. You should be able to downshift anytime anywhere as well as full on power shifts. If you are over travel on synchro assemblies, it needs to come apart and figure out what is wrong.