Rear-end Archives ~ Roadkill Customs

Differential Gear Ratio Calculator

February 3, 2016 Roadkill Customs

Enter the maximum potential safe engine RPM. Enter the tire size diameter and the target vehicle speed in MPH. Click “Calculate Differential Gear Ratio”. The value will be returned in estimated differential gear ratio, based on the entered values. […]

How To Select Proper Rear-End / Differential Gear Ratio

May 7, 2015 Roadkill Customs

A number of factors must be considered when selecting a rear-end gear ratio (ring & pinion set). Tire diameter, transmission choice (with or without overdrive) and desired highway cruising speed. […]

Speed Potential Calculator for Ring Gear and Pinion Changes

February 4, 2015 Roadkill Customs

This calculator is designed to give the potential speed values of a vehicle, based on the RPM of the engine, the ring gear and pinion gear ration, the final transmission gear ration (usually 1.00) and the tire diameter, ground to top of tire as mounted. […]

Rear-End Widths of Classic American Cars

May 28, 2014 Roadkill Customs

Rear-End Widths of Classic American Cars including Chevy, Ford, and Mopar. […]

Understanding Differential Gears

August 12, 2010 Roadkill Customs

I got into a discussion some time ago about welding a rear-end on a street vehicle – It became clear that the guy I was discussing this with did not fully understand how a differential works. This video was made in the 1930’s or so and is the best explanation I have seen to date. […]

Axle Flange Housing Identification

August 22, 2009 Roadkill Customs

Axle Flange Housing Identification. Chevrolet, Ford, Oldsmobile, Pontiac — they all use different axle flanges. The ability to identify the flange you have can save time and hassle when it comes time to buy parts. Use the figure below to help identify some of the more common axle flanges… […]

Differential Identification Chart

March 27, 1997 Roadkill Customs

Your differential is the set of gears that allows your vehicle’s driven wheels to revolve at different speeds by splitting your engine torque in two directions. This differential ID chart shows AMC, Chrysler, Dana, Ford, and GM differentials. […]