NP435. Granted, meant to be shifted deliberately, not like a race car. Had unknown fluid, suspected to by syn though, that shifted ok if slow to down-shift. Changed to MT-90. Little smoother upshifts, certainly better down-shifts, and the old drive train roar is QUIETER by a surprising margin. I don't know what accounts for that. (Yes, the old fluid was topped up adequately.)
Prior experience was with the chitty borg-warner trans design saab used in the 99/900. MTL in those improved shifting; it was still a long throw even with a short kit, but it was more cooperative anyway. Whether MTL contributed pro/con to that transmission's already questionable longevity remains a mystery.
