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Source: Motor Age

Rear axle service simplified

February 2, 2012
By:Vanessa Attwell

Rear differential service, for regular maintenance or for repair work such as replacing leaking seals, often involves removing rear axles and draining and replacing differential fluid.

Source: Motor Age

Sensing wheel technology changes

January 30, 2012
By:Richard McCuistian

As long as vehicles have been rolling, the speed of the load-carrying wheels has been an issue. When I was a young boy watching western movies in the 1960s, I could always tell when a wagon was going to crash, because the camera would focus on a wood-spoked, steel-tired wagon wheel that was obviously spinning faster than it should. Those wooden wheels had a hard wood hub spinning on a hard wood axle; there was no bearing at all except for the animal fat-based grease that was packed in between the components.

Source: Motor Age

The drum brake wedge effect

January 30, 2012
By:Peter F. Meier

In this issue of Motor Age, our contributors have shared information on the intricacies of wheel speed sensors and the proper care and servicing of rear differentials and axles. My contribution this month is a discussion on the care and feeding of conventional drum brakes.

Source: Motor Age

Diagnosing and repairing NVLD systems can present unique challenges

January 17, 2012
By:Peter F. Meier

Chrysler's NVLD, or Natural Vacuum Leak Detection, system was first introduced in 2002 as an alternative to its Leak Detection Pump (LDP) method for the onboard testing of the evaporative emissions system. In an automotive application, the fuel system is sealed when the vehicle is in a key off condition. The powertrain control module (PCM) monitors the state of a switch contained within the NVLD assembly.

Source: Motor Age

Mechanically sound engines

January 4, 2012
By:Peter F. Meier

Engines today are producing more power from smaller displacements and using less fuel in the process. But to do so, these same designs are less tolerant than those of years past. Small variances in any of the factors related to combustion can result in noticeable drivability issues for the owner.

Source: Motor Age

Programming Cadillac and Corvette PCMs

January 3, 2012
By:Jim Garrido

Many shops are delving into ECU programming work these days. Beginning here, we are going to run a series of tips and tricks I have learned that will help you through some rough spots in these programming procedures.

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