What is meant by "Final drive ratio"?
- 1 decade agoFavorite Answer
It is the ratio of the driveshaft (or transmission output shaft) to rear wheel revolutions. 3.5 revolutions of the driveshaft for each revolution of the wheel = 3.5:1 final drive ratio.
Fo FWD its trickier to figure out as there is no drivehaft per se.
higher numerical values ("lower gears" i.e 3.5:1 or 4:1) typically (but not always)give better acceration, lower top speed, worse gas mileage, better towing ability. Lower values (2.5:1 or 3:1) behave the oppositeSource(s): Engineer + Car Guy
- Kiffin # 1Lv 61 decade ago
The ratio of the driven gears to the ones that are doing the driving.
The lower the axle ratio (higher numbers such as 3:73. 3.90, 4.11, 4.33 4.46, 4.88 or 5.13), the faster the vehicle will accelerate from a standstill, but with a higher ratio (lower numbers such as 3.50, 3.23, 3.08, 2.90 or higher) the better the mileage of the vehicle
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- 1 decade ago
Usually means the ratio of the 'axle' and the last gear on the tranny. OD is usually a fraction (0.79:1) while direct is 1:1.Source(s): Search for Gear Vendors. They list common truck tranny and axle combos.
- simonj_smithLv 41 decade ago
the final drive ratio is the gear ratio of the final driving axle.Rwd would be the diff ratio
- 1 decade ago
that is the mathematical compilation of all gear ratios from the transmission, transfer-case, and the differential/final drive.
- gdwrnch40Lv 61 decade ago
Top gear out of the transmission.