I gave a half-bottle of Lucas transmission fix a try a few weeks ago. Now, before I get jumped on, my transmission was perfect BEFORE I added it, so I wasn't covering up any existing damage. It seems to have smoothed out the shuddering 1-2 shift that sometimes happens with any ford FWD transmission. Kinda launches into 2nd like my parents gmc safari, but not near as harsh. Anyone who has driven one of those knows what I mean.