What Is a 6-Speed Automatic Transmission?
Learn how a six-speed automatic works, what its gear ratios mean for everyday driving and fuel economy, and where GM and Ford joint development fits.
Systems Page 22
How engines, transmissions, brakes, suspension and electronics actually work.
Truck Struts: Leveling, Adjustment, Fitment and Wear Signs
Understand truck strut wear, leveling, spacers, height and damping adjustments, plus F-150 fitment checks and the basics of coilover assemblies.
What Is Air Suspension in a Car and How Does It Work?
Learn how car air suspension uses air springs, compressors, and sensors to adjust ride height, plus its benefits, limitations, and signs of trouble.
BMW Tire Pressure Sensors: How They Work, Warnings, and Resets
Understand BMW tire pressure sensors, TPMS/RDC warnings, reset basics, and common failure symptoms, including when a shop should test the system.
GM 6.5 Diesel and Duramax Turbocharger Problems and Replacement
Understand turbo symptoms, diagnosis limits, and replacement basics for GM 6.5 diesel and 6.6 Duramax trucks, including when professional testing helps.
Turbo Exhaust Manifolds, Downpipes and Turbo Mufflers Explained
Understand how turbo exhaust manifolds and downpipes route exhaust, what manifold cracks can signal, and where a turbo muffler fits in the system.
Direct and Indirect TPMS: How They Work and How to Identify Your System
Learn how direct and indirect tire pressure monitoring systems work, how to identify your vehicle’s setup, and what their warning lights can tell you.
High-Performance Automatic Transmissions and Upgrades Explained
Understand performance automatic transmission builds, shift kits, torque converters, cooling needs, and the everyday tradeoffs of street-focused upgrades.
Shocks and Struts: How They Work and When Replacement Is Needed
Learn what shocks and struts do, how wear can affect ride and control, and what to expect from a professional inspection and strut replacement.
CVT Transmission Belt and Chain Function, Wear, and Replacement
Learn how CVT steel belts and chains work, which symptoms need diagnosis, what replacement involves, and what shapes repair costs for Nissan and Honda.
Differential Gear Oil Grades: 75W-85, 75W-90, 75W-140, 80W-90
Understand differential gear oil viscosity grades, how to confirm the required specification, and why the wrong fluid can affect axle operation.
Who Makes Turbochargers? Garrett, IHI, Holset, and Schwitzer
Explore major OEM turbocharger makers, the Holset HX35 family, Garrett and Schwitzer brand history, and how to identify the turbo on your engine.
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