My '90 6-speed balks (no grinding) occasionally when upshifting from second gear to third gear. It works best if just relying on the spring loaded shifter mechanism, and pushing straight forward out of second gear (slowly enough to avoid going into first gear). Downshifting from fourth gear into third gear is perfect. This transmission never grinds. The clutch is good, with no crunching/bad noises when shifting from first into reverse. The car has approximately 20k miles, the CAGS bung has been removed, and the spec gear lube level is full. Has anyone else experienced and remedied this problem, and if so, how? Thank you very much!