Overdrive, what is it?

425

Asked by Jul 16, 2008 at 03:19 PM

Question type: General

Whats the difference between a car with a 4speed+overdrive, and a car with a 5speed auto?

2 Answers

5,015

As simple as I can describe it, 5 speed auto has one more available gear ratio than a 4 speed. A 5 speed auto can also have an overdrive. Numerically a gear ratio below 1:1, for instance .50:1 is an overdrive ratio. So for a .50:1 ratio, that means that for every one engine rotation, the transmission has gone through two full rotation. This advantage allows better fuel economy if matched at the correct vehicle speed range.

195

One is a slushbox, the other is a slushbox with a button

Your Answer

Shortcuts

General Experts

  • #1
    Tom Demyan
    Reputation
    51,910
  • #2
    COMETGUY61
    Reputation
    40,810
  • #3
    F_O_R
    Reputation
    18,840
View All

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.