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Tacky or Techie? The Tachometer.Posted June 23, 2019 12:09 PMThere's a gauge that many vehicles have that says RPM on it. And there are a lot of people who either don't pay any attention to it or don't even know what it is. Here's why it's a good gauge to know about. It's called a tachometer, and that "RPM" label means it is measuring how many revolutions per minute (RPM) the engine is turning. Automotive experts know that a vehicle's engine can be damaged if it turns too fast (revving too high) or too slowly ("lugging" the engine). A tachometer (sometimes called a tach) is almost a "must-have" gauge for vehicles with a manual transmission; the driver has to manually change gears; the tach helps the driver know when revolutions are in the optimal range. Some say you don't need a tachometer if you drive a vehicle with an automatic transmission. It's true that most drivers of automatics don't even look at it. But there are times when paying attention to the tach can help you prevent an expensive repair. Here's a good example. Manufacturers now build many of their automatic transmission vehicles with shift paddles. They let you shift gears without a clutch. That's manual shifting, and drivers need to know they're not revving the engine too high. That's where the tachometer comes in, since it shows you visually when you are in the red zone (RPM too high). Here's another way the tach can help you: fuel economy. Generally speaking, the lower the RPM, the better the fuel economy. It's not good to go too low, of course, and the tachometer will help you find that spot of maximum efficiency. You can also spot problems by paying attention to the tach. When your vehicle stays in first gear longer than usual (higher reading on the tach), then the RPM dip lower than usual after shifting, it may be that your vehicle's transmission is skipping a gear. Plus, if your vehicle's RPM go up but your speed doesn't, it could mean your transmission is slipping. Either situation should be checked by a trained technician. If your commute takes you down some long grades, you might like to put your vehicle in a lower gear to help slow down the car (and not burn up the brakes). Having a tachometer keeps tabs on when your engine is revving too high. So, consider the tachometer a "bonus" gauge. It's one more helpful assistant that can help you spot and prevent problems in your vehicle. Long Hill Auto Service
1905 Long Hill Rd
Millington, NJ 07946
(908) 647-7984
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I have been taking my cars to Long Hill Auto since 2002. In the past 20+ years I have experienced nothing short of exceptional service and attention to every issue - both major and minor - that has come up. Bob is not only a highly skilled and knowledgeable mechanic, he is also an amazing person who even once loaned me his own car when my car needed service and a loaner wasn't available. If you have a car in NJ, Bob and Long Hill Auto is who you want taking care of it for you. 100% recommend without hesitation. Kai Rieger, 09/27/2023 |
First class service in a clean and well equipped shop! Thank you Bob and crew for another outstanding job on my 2018 Ram 2500 diesel! Thomas Mclaughlin, 09/22/2023 |
I had a flat tire while I was driving on the highway, so I was in an emergency. I went to the Long Hill Auto service. They seemed quite busy. I explained my situation that I needed to bring my son somewhere by 6pm. They took my car and fixed the tire in less than an hour. The staff explained all the details to me. I had no one to take me home so I waited there. While I was waiting for the tire to be repaired, all the staff were so friendly and the owner served me a delicious hot coffee. :) I could say that they have the best and speedy service. Ejay Kim, 08/29/2023 |