Questions regarding automatic gearboxes, and associated parts such as torque converters

learn more… | top users | synonyms

13
votes
5answers
58k views

What's the point of the D3 gear in an automatic transmission?

My Honda Civic has a D gear and a D3, which apparently prevents it from going into 4th. Why would I want to do this? What is it good for? Does it make my fuel efficiency better or worse? Does it ...