If you suspect your transmission is running rough, Lucas Transmission Fix promises to make changing gears more smooth, but it can only go so far.

Replacing a transmission is expensive, so it's best to take care of the one you've got. These additives are said to fix minor problems and improve performance.

There’s no bones about it: slipping transmissions cost big money, whether you’re a humble owner or a giant car company. Perhaps the best recent example is the PowerShift transmission, which in ...