Most new vehicles are equipped with an automatic transmission. As a result, there's not really much maintenance to perform. Still, most owner’s manuals will recommend changing the transmission fluid every 90,000 miles or so. Flushing your transmission’s fluid has fallen out of vogue in recent years because the high-pressure cleaning involved may dislodge debris inside the transmission that can literally gum up the works. By following your vehicle’s maintenance schedule, your car’s gearbox will offer years of trouble-free driving. For more information check with your owner’s manual and your dealership service advisor.