Last updated 1 day ago
Did you know that the continuously variable transmission (CVT) was invented before the automobile? Leonardo DaVinci actually sketched out a CVT in his journal more than 500 years ago. Read on to learn more about the technology behind CVTs that allows them to achieve better fuel efficiency than a conventional automatic or manual transmission.
The pulley-based CVT is the most common type of CVT. Unlike traditional transmissions, which have fixed gears, the CVT has a pulley that gives the transmission an infinite number of possible gear ratios, without discrete steps or shifts between gears. The CVT comes with a number of microprocessors and sensors that help the transmission select the best gear ratio given the current driving needs. To adjust the gear ratio, the two cones of the pulley move farther apart or closer together.
Some vehicles made by Nissan and a handful of other manufacturers use a Toroidal CVT system. The components of the Toroidal CVT are comparable to those inside a pulley-based system. Instead of a system of pulleys, this CVT comes with discs—one attached to the engine and another to the drive shaft. Rollers found in between the disks act like the belt, transferring power from one disc to the other.
The CVTs previously mentioned are frictional CVTs. They work by changing the distance between two rotating objects to achieve a specific gear ratio. Instead of using friction to vary the gear ratio, a hydrostatic CVT uses pumps to vary the fluid flow. When combined with a planetary gearset and clutches, a hydromechanical transmission is formed, which is ideal for all-terrain vehicles and tractors.
Superior Transmissions of Washington D.C. is a family owned and operated transmission shop with more than 36 years of experience in the transmission repair and maintenance industry. Call us at (301) 358-6288 if you have any questions for us, and visit our website to see our locations in the D.C. area.
Last updated 11 days ago
If you have an automatic transmission, it’s important to check the fluid every 3 months or 5,000 miles to make sure the fluid is clean and that there is enough of it. To do this, open up the hood and look for a yellow dipstick handle. Be sure to start the car before pulling the dipstick out. The transmission fluid level should be between the two dots on the dipstick. Reinstall the dipstick before driving the vehicle. For more tips on how to check your transmission fluid levels, watch the video clip.
For the highest quality transmission maintenance and repair, come to Superior Transmissions of Washington D.C. Our family owned and operated auto shop has 36 years of experiencing serving the D.C. Metro area. Call us at (301) 358-6288 or visit our website to find the shop nearest you or to learn more about our transmission repair and maintenance services.
Last updated 17 days ago
First introduced sometime in the late 19th or early 20th century, the automatic transmission has made driving easier, safer, and more efficient. Between then and now the automatic transmission has developed considerably. In this article we will explore the history and evolution of the automatic transmission in greater detail.
The first automatic transmission may have been built as early as the 1890s, but the first successful mass-produced automatic transmission is widely thought to be the GM Hydramatic, which was introduced in 1939. The Hydramatic came with four speeds but did not come with a “park” setting, so after parking drivers would have to shut off the engine and select “reverse” to lock the transmission.
The first well-known production car with an automated manual transmission was the 1989 Porsche 911. The Porsche 911’s Tiptronic transmission was just like other automatic transmissions, but also let drivers choose a gear by pressing buttons on the steering wheel or nudging the gear lever.
A type of semi-automatic transmission, the dual-clutch transmission comes with two clutches. One clutch handles the odd gears, while the other handles the even gears. This allows faster shifting with less torque interruption.
Continuously Variable Transmissions
The CVT is vastly different from other types of automatic transmissions because it does not have pre-configured gear ratios. First, the CVT’s sensors and processors determine what the best gear ratio is for the current driving situation. Then the CVT adjusts the gear ratio for optimal power and efficiency. In a pulley-based system, the most common type of CVT system, the gear ratio is adjusted on the fly by moving two cones closer together or farther apart.
If you need transmission service in the Washington D.C. area for your automatic transmission, come to Superior Transmissions. Call us at (301) 358-6288 if you have any questions for our transmission repair experts. Visit our website to learn about what our family owned and operated transmission shop has to offer you.
Last updated 29 days ago
A slipping clutch is one of the most common transmission problems that can occur in a manual transmission. If you drive through traffic in the Washington, D.C. area frequently, your vehicle may be especially prone to a slipping clutch. In this article we will explore the signs and symptoms of a slipping clutch, and where you can go to get the problem fixed.
Change in Engine Speed without Acceleration
This is usually the first thing that drivers notice when their vehicle has a slipping clutch. If you’re driving down the street and suddenly the car slows down but the engine continues to rev, the clutch is probably slipping.
If you press on the gas pedal and notice that the engine RPMs increase but the vehicle does not accelerate right away, then the clutch isn’t delivering power to the wheels. Oftentimes this is a side effect of a slipping clutch.
Different Level of Clutch Engagement
Clutch pedals engage at different heights, depending on the make and model of the car and the level of clutch wear. If your car’s clutch pedal is engaging at a different height than normal, then the clutch could be wearing out and slipping.
Reduced Engine Power during Towing
A slipping clutch is ineffective at routing engine power to the drive wheels. This is especially noticeable when the vehicle is pulling a heavy load. If you notice that the engine seems to run out of power when you’re towing, go to your local transmission shop to see if the clutch is slipping.
Burning Smell Coming From Under the Hood
A burning smell under the hood can be the result of a serious issue, such as an oil leak or worn out electrical wiring. This smell can also come from a slipping clutch that is burning and wearing out.
If you are experiencing transmission or clutch problems, contact Superior Transmissions of Washington D.C. For more information about the transmission repair and maintenance services that we offer, head to our website. And call us at (301) 358-6288 if you have any questions for our certified transmission repair technicians.
Last updated 1 month ago
Transmission fluid lubricates your vehicle’s transmission so that it can shift gears smoothly and efficiently, while cooling the transmission to prevent it from overheating. Transmission failure can occur if there is a shortage of transmission fluid, so it’s important to check under your car for leaks. If your vehicle is leaking a reddish or brownish fluid, read this article to determine if it is a transmission fluid leak.
Color and Feel
When automatic transmission fluid is new, it usually has a light red color. Older fluid is dark red or brownish. If one of these colors matches the fluid leak underneath your car, feeling the fluid can help you determine if it’s from the transmission. If it is transmission fluid, it will feel thick and oily. If the transmission fluid is older and needs to be changed, it will smell burnt.
Transmission fluid typically leaks near the front or middle of the vehicle. If you notice that the fluid leak is near the transmission filler tub, the transmission fluid drain hole, or the selector shaft, it’s likely to be transmission fluid.
A slow transmission usually indicates that there is a fluid shortage, which is oftentimes the result of a leak. If the transmission does not start at all, there may not be any fluid left in the reservoir. These things are especially likely to happen if you do not maintain your transmission regularly. For most cars, this means changing the transmission fluid every two years or 30,000 miles.
Save your vehicle’s transmission from failure by taking it to Superior Transmissions of Washington D.C. as soon as possible after noticing a fluid leak. Our transmission repair shop has 30 years of experience repairing and maintaining transmissions. For more information about our transmission repair and maintenance services, call us at (301) 358-6288 or visit our website.