What should the speed of a Speedo gears be?
What should the speed of a Speedo gears be?
Whip out your calculator and follow along. Let’s assume that your truck is currently equipped with 2.73 gears and that you’re planning to install a 3.73 ring and pinion. If you didn’t change speedometer gears, actual vehicle speed would 73.1 percent of indicated speed (2.73/3.73 = .731).
What is drive gear number 8642620 in Speedo?
With drive gear number 8642620, (gray, 15 teeth) the following combinations apply: Lower ratio (higher numerically) rear or smaller diameter tire requires higher driven gear tooth count. Increasing or decreasing driven gear tooth count by one will usually accommodate a 1/2″ to 1″ change in tire diameter.
What are the gears on a Ford speedometer?
Ford Speedometer Gears – Ford drive gears are machined into the output shaft on C3/C4/C5/C6 & AOD transmissions. You may need to remove your tailhousing to determine how many drive teeth your transmission has. 1 – This is a retrofit gear to allow the speedometer to function with 3.73 and 4.10 rear end gears.
How many teeth are in a TCI speedometer?
– Two 2.078″ diameter housings, each made from either aluminum or plastic, are available for driven gears with 34 or more teeth. One fits gears from 34 – 39 teeth and the second one fits gears from 40 – 45 teeth. – The driven gear housings go in the tailhousing assembly on all two-wheel drive applications.
What should the gear ratio be on a Speedo?
Unless driven gears with more than 45 teeth, and/or drive gears with fewer than 15 teeth become available, it will be impossible to have an accurate speedometer with rearend gear ratios lower (higher numerically) than 3.90:1 – unless 28-inch or larger tires are installed.
How many gears are in a Dodge speedometer?
Most cars and trucks with low rear end ratios will take a 15 tooth drive gear. There are two driven gear housings, one for 34 through 39 tooth driven gears and one for 40 through 45 tooth driven gears. Look at the bottom of the speedometer face for the numbers 940, 960, 1000, or 1020.
With drive gear number 8642620, (gray, 15 teeth) the following combinations apply: Lower ratio (higher numerically) rear or smaller diameter tire requires higher driven gear tooth count. Increasing or decreasing driven gear tooth count by one will usually accommodate a 1/2″ to 1″ change in tire diameter.
What kind of gears are in a 37 Chevy?
Based on that, it looked like a ’37 Chevy car rear axle/torque tube and driveshaft with the 3.55 powerglide gears installed might be the answer. The next step was to get the pieces and see if the ’50-’54 gears were a fit in the ’37 axle housing.
