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The best explanation of a differential is from 1937

The first time I saw this video, I was hooked because I’m natively a bike guy and it starts off with motorcycle stunt riding. But the guys horsing around on those ol’ Harley VLs actually are the producer’s interesting and educational way to visually demonstrate why a...

Rust exhaust hole – ASE practice questions (VIDEO)

Description Which of the following is the most critical result of a rust hole in an exhaust system? A) Escaping exhaust gas B) Failed inspection C) Excessive noise D) High cost of repairMore ASE Practice Questions

Before selling a vehicle, make sure to remove personal data (VIDEO)

Description Smartphones, laptops and computers are normally cleared of all data before selling or discarding to protect personal information. Modern vehicles store all kind of information in their infotainment systems and that means they should be treated with the...

Dust Cap Tool Explained (VIDEO)

Description How many times have you seen a hub dust cap with ugly dents from a sloppy installation? A dust cap tool is handy for installations on customer vehicles. It helps to prevent damage while securely driving the cap into place.

Why a magnetic drain plug is a worthwhile upgrade (VIDEO)

Description Do your customers know the benefits of magnetic oil drain plugs? Swap out their standard drain plugs to help protect against unnecessary engine damage. Magnetic drain plugs are especially helpful for vehicles with long oil change intervals, as well as many...

Brake booster valve – ASE practice questions (VIDEO)

Description A customer states the brake pedal falls slightly when the brakes are applied while starting the engine. Technician A says that a faulty brake booster check valve may be to blame. Technician B says this can be caused by a leaking brake booster diaphragm....

The final days (and cars) of AMC

In the last days of AMC, two employees brought a video camera into the Kenosha, Wisconsin plant to document the end of an era. Billy and Danny take a thorough tour of the old AMC buildings and production line, which was producing its last L-body Plymouth Horizons and...

What is a core charge?

The article title is a question I asked when I was a young counterman, and most of you oldtimer mechanics and parts people of course know the story: the core charge is a way to be sure the smoked part makes its way back to the parts counter. A core charge is a deposit...

Is perseverance in the service bay a feature or a bug?

Is perseverance in the service bay a feature or a bug?

I am a proficient mechanic. I have long said my proficiency comes partially from skill, but mostly I’ve achieved good results due to my perseverance. I am generally unwilling to toss in the towel on something until it works correctly. “Too stupid to know when to quit”...
Tool review: ICON 3/8” ratchet

Tool review: ICON 3/8” ratchet

Disclaimer: I purchased this tool at full retail price at my own expense, with no compensation to write about the item. About a year ago, I was reefing on some fastener, and my trusty old Armstrong ratchet let go and spun free. It did it again a few bolts later, and...
How to test and fix a car USB charger (VIDEO)

How to test and fix a car USB charger (VIDEO)

How to test and fix a car USB charger (VIDEO) Description Most late-model cars have a USB charging port for smartphones and other devices. In older vehicles, many owners have added USB charging capabilities with cigarette lighter adapters powered by accessory...
What are the sockets and wrenches you can do without?

What are the sockets and wrenches you can do without?

I was standing in the Dorman Proving Grounds the other day talking to Nick and Luke, both of whom wrench and appear in our videos. We got on the topic of sockets and wrenches we don’t use much. “20 millimeter,” Luke said. Nick’s 9mm socket wasn’t getting much use....