What is ring and pinion gear ratio?
The ratio is the number of teeth on the driven gear (ring) divided by the number of teeth on the drive gear (pinion). So, if the ring gear has 37 teeth and the pinion has 9 teeth, the ratio is 4.11:1. That also means that for every one turn of the ring gear, the pinion will turn 4.11 times.
How do you calculate ring and pinion gear ratio?
The calculation uses the number of teeth in the ring gear and divides it by the number of teeth in the pinion gear to provide you with a “[result] to 1” ratio. For example, if the pinion gear has 41 teeth, and the ring gear has 11 teeth, the ratio would be calculated as 41/11, which is equal to 3.73 = 3.73:1.
What is a good gear ratio?
In the real world, typical street machines with aspirations for good dragstrip performance generally run quickest with 4.10:1 gears. Lower gears are required if the car is very heavy, or if the engine makes its power at the upper end of the rpm scale.
How many teeth do 3.55 gears have?
39-11 Teeth
Technical Details
| Manufacturer | Motive Gear |
|---|---|
| Brand | Motive Gear |
| Model | Motive Gear D35-355 Rack and Pinion, 39-11 Teeth, 3.55 Ratio |
| Item Weight | 11.44 pounds |
| Product Dimensions | 15.5 x 11 x 5.25 inches |
How do I choose the right gear ratio?
TRACK-OUT GEARING The conventional procedure for selecting gear ratios is to pick ratios that run the engine rpm to redline at the end of the medium and longest straights, and pick the lower gear ratios to minimize the rev drop at each shift. This method minimizes the number of shifts per lap.
How do I know what gear ratio My truck has?
The gear ratio is usually listed in the VIN code located on driver’s door, the glove box, or the ID plate on the dashboard. Count the times a rear wheel goes around for one driveshaft turn: if its 3 1/2 it’s a 3.50:1.