February 2014 Archives - Brake & Front End
BRAKELIGHT: Ford Helps Disabled Veterans (June 1951)

More than 250,000 soldiers were wounded in WWII. Some of them could not operate a car using the normal controls. Car makers and shops realized that they had a debt to pay to these veterans. When new cars could be bought after the war, just about every automaker offered hand controls at no extra cost.

Measure Rotor Thickness, Runout: Stop Pulsation Comebacks Before They Start

Let’s say a vehicle had .003″ of lateral runout when measured at the outside face of the rotor. If this vehicle is riding on 205/55R16 tires, in one mile, the high-spot with .003″ of runout goes past the caliper approximately 836 times. Over 6,000 miles, that spot on the rotor will go past the pads more than 5 million times. Every time this spot passes the pads, a little bit of the rotor’s material is removed. Over the course of those 5 million revolutions, enough material is removed to create a thickness variation that can be felt by the driver. This is why it is critical to measure thickness and runout in a brake rotor and wheel flange even if new rotors are going to be installed.

correct rotor runout
Start Solving Transmission Electronic Control Problems

Troubleshooting an automatic transmission can be one of the most intimidating diagnostic procedures at a shop. The first reaction is typically, “We don’t do that type of work.” But there is profit in performing drivetrain diagnostics and “in-the-car” repairs.