Footwear impression marks { the mark made by the outside surface of the sole of a shoe (the. outsole) { are distinctive patterns often found at crime scenes. They are among the most. commonly found evidence at crime scenes and present more frequently than ngerprints.
Start with a two-gear train. To be able to determine a gear ratio, you must have at least two gears attached to each other â this is called a gear train.. Usually, the first gear is a drive gear attached to the motor shaft and the second is a driven gear attached to the load shaft.. Divide the teeth numbers of the drive and driven gears. The important thing to remember when dealing with gear trains with more than two gears is that only the driver and driven gears (usually the first and last ones) matter. In other words, the idler gears don't affect the gear ratio of the overall train at all.
The various numbers that will allow you to identify your differential are highlighted in the photo below. The identification code will tell you the gear ratio, if it is a posi, and in some cases what engine and transmission the car is equipped with. It is located on the right hand side of the case and is composed of two letters. This code is marked with RED in the location photo above. The ratio may also be determined if the ratio tag is still in place. This tag location is marked with PURPLE in the location photo above.