Quote:
Originally Posted by dimitarm
Is this mod affecting idle rpm's?
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no, its the final drive ratio. Only effects the mechanical advantage of power through the driveline when the car is in gear. engine/flywheel/clutch or torque converter if your auto/transmission/drive shaft, rear diff "where FD is located"
The final drive determines the ratio of how many revolutions the driveshaft makes to turn the rear differential or tires one turn, or 1 foot radius to be more precise. if its a 4.08 to 1 the drive gear rotates 4.08 times and the driven gear rotates once.