Lemmy explains why this basic task always comes before removing the positive cable to help you understand the theory behind the practice.

He also synthesized chlorofluorocarbons (CFCs).
Ever spot what appears to be a second oil filter under a vehicle? Lemmy and Nick discuss the advantages of spin-on transmission filters for fluid protection and service.
Peering inside the inner workings of a deceptively complex tool
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Auto care news and advice you can use.
Technician A is diagnosing a misfire. He states that a misfire is caused by a fault in the ignition system and that new plugs and coils will repair the problem. Technician B says that a misfire is detected when the ECM detects a variation in crankshaft speed.
Formal education teaches you theory and the real world teaches you the rest.
The right tools will expand your capabilities and help you to tackle more advanced jobs, but it’s not always easy to know where to start.
It’s been asked of every new mechanic for more than a century. Does it matter in 2025?
Want to make your vehicle last? Not sure how to talk to a shop about car repairs? Nick and Lemmy offer their five top recommendations.
Are you a wrench and a writer? A counterperson and a communicator? A service writer and a scribe? Get paid to share your experience and expertise with thousands of Shop Press readers.
Auto care news and advice you can use.
Grab a generic OBD-II scan tool and take these first steps to turn it off and keep it off.
Ready to grow your shop’s business with fleet maintenance, service and repairs?
There are many types of punches. There’s a reason for that.
A helpful video investigation of proper (and improper) torque wrench techniques and habits.
It’s much more than just Christine.
Step up your repair game with sensible choices.
You can’t sell what you don’t understand.
A fluid transfer pump is the cleanest and easiest way to fill a differential, transmission or transfer case with its necessary fluid.