The trans shifts good in the lower gears but 3rd and 4th are notchy shifting. I recently put in a new MH FAG layshaft ball bearing, a very thin kicker shaft shim and am currently running ATF fluid. Any idea what it could be, especially since the problem is only apparent in 3rd and 4th gear, on both downshift and upshifts? If feels like a tight clutch but shifts fine in 1st and 2nd. I have played with the clutch adjustment, and the primary chain has the correct tension. Will try a different oil before I tear into it again.