Manually shifting

Do I have to use the Driver Shift Control while going up a hill
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Hi There,
You should not need to use the shift control to manually shift the vehicle when traveling uphill. Today’s automatic transmissions are designed to automatically shift up and down depending on the conditions. In your case, when traveling uphill, the transmission should automatically downshift to the next lower gear by the use of a solenoid inside the transmission in order to generate the necessary power to climb the hill. If this is not working properly, you may need to have your transmission looked at by a qualified professional such as one from YourMechanic.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Buyers have a choice of six-speed manual or a six-speed automatic transmission, and the option of all wheel drive or standard rear wheel drive.
The new Hydra-Matic 8L90 eight-speed paddle-shift automatic transmission is available in the ATS-V. Designed and built by GM, it delivers world-class shift times that rival the best dual-clutch designs. For performance driving, the transmission offers full manual control via steering wheel paddles.
Failed Brake Light Switch: If you`re unable to shift out of park with an automatic transmission, the most likely culprit is the brake light switch. It`s mounted to the brake pedal and designed to engage the shift lock solenoid if it detects that your brake lights aren`t working.
Remove the dipstick, being careful not to spill or drip any fluid. Wipe off the dipstick with a clean rag, just as you would do when checking the engine oil. Reinsert the dipstick, then remove the dipstick again to check the fluid level. If you need to top it off, be sure to use the recommended transmission fluid.
Technically, a CVT is an automatic transmission because the driver isn`t required to shift between the forward gears or operate a clutch pedal manually.
Unlike conventional design, a car with a clutchless manual transmission does not have the clutch pedal at all. IMT is just like any other automatic transmission but without a clutch pedal. This system allows the driver to change gears manually but without the need to use a clutch pedal.
Why the Transmission Won`t Shift Gears. One reason why an automatic transmission isn`t shifting into gear has to do with the fluid. If it`s not at the right level or the incorrect type has been used, then it`ll affect the gears. Another big reason has to do with the ECM possibly going bad.
Locate automatic transmission fluid dipstick, typically near where the transmission or transaxle meets rear of the engine. It looks similar to the oil dipstick.
Check the Level

With the engine warmed up, leave the car idling in park on a level surface. Pull out the dipstick, wipe it clean, replace it slowly, and then pull it back out. Check the fluid level—how high the fluid comes up on the dipstick—against the “full” and “low” or “fill” marks on the dipstick.

A CVT doesn`t have gears in the traditional sense. There`s no shifting, and that`s a new experience for most drivers. CVTs prompted their fair share of doubt early on, whether it be because of the way they operate or out of concern for durability.
Instead of gears, CVT transmissions use two pulleys, the width of which can be adjusted in opposite, but equal amounts by actuators that are in their turn, controlled by microprocessors.
Most new or used motorcycles clutchless shift just fine, but some bikes like those with heavy flywheels or wide-ratio gearboxes don`t take kindly to the technique, so don`t feel bad if you`re struggling.
1941 – One year after Oldsmobile, Cadillac introduces its first fully automatic transmission with a hydraulic clutch and a four-speed planetary gear set.
Volkswagen DSGs do not have a clutch pedal as you get in a fully manual car. Although the DSG has two gearboxes and two clutches, these are all operated hydraulically and electronically. Having no need for the traditional clutch pedal, the DSG is similar to vehicles with a fully automatic transmission.
Hydramatic (also known as Hydra-Matic) is an automatic transmission developed by both General Motors` Cadillac and Oldsmobile divisions.
These manual CTS-V coupes were powered by a supercharged 6.2L `LSA` V8 engine that generated 556hp and 551 lb ft of torque that drove the rear wheels via a 6 speed Tremec manual transmission.
Introduced in January 2002 as a 2003 model, the CTS sedan was built on GM`s new rear-wheel drive Sigma platform and sported a fully independent suspension. It was the first Cadillac to be offered with a manual transmission since the 1988 Cimarron. The CTS was designed as a replacement for the Opel-based Catera.
Up until the 2015 model year, the had a standard six-speed automatic transmission in every model. In 2016, however, the ATS became available with a manual transmission option.
Introduced in January 2002 as a 2003 model, the CTS sedan was built on GM`s new rear-wheel drive Sigma platform and sported a fully independent suspension. It was the first Cadillac to be offered with a manual transmission since the 1988 Cimarron. The CTS was designed as a replacement for the Opel-based Catera.
It was Cadillac`s first small car since the Cimarron, an infamous failure of the 1980s. “Production of the ATS sedan is ending due to extensive plant upgrades, expansion and re-tooling to prepare for the next generation of Cadillac sedans,” Cadillac spokesman Donny Nordlicht said Wednesday.
These manual CTS-V coupes were powered by a supercharged 6.2L `LSA` V8 engine that generated 556hp and 551 lb ft of torque that drove the rear wheels via a 6 speed Tremec manual transmission.
It was Cadillac`s first small car since the Cimarron, an infamous failure of the 1980s. “Production of the ATS sedan is ending due to extensive plant upgrades, expansion and re-tooling to prepare for the next generation of Cadillac sedans,” Cadillac spokesman Donny Nordlicht said Wednesday.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Switch to Manual mode, but gears don’t seem to change any more in that mode.
ANSWER : This is an internal problem with the shift switch on the transmission selector. The transmission would need to be tested to see if it is a defective selector switch, or the transmission valve body problem. The system would need to be tested since the system goes through the transmission control module and sends signals on the computer network to the dash display. If the system is in a failure mode, then it may not let you go into manual mode. Have the transmission checked just in case the system has an internal failure.

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Switch to Manual mode, but gears don’t seem to change any more in that mode
ANSWER : This is an internal problem with the shift switch on the transmission selector. The transmission would need to be tested to see if it is a defective selector switch or a transmission valve body problem. The system would need to be tested since the system goes through the transmission control module, and sends signals on the computer network to the dash display. If the system is in failure mode, then it may not let you go into manual mode. Have your gear shifting issue checked just incase the transmission has an internal failure.

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Won’t shift out of first unless you let go of gas but it will shift back down and never grab second
ANSWER : If you have all the drive shafts in the front and rear, then you will damage the transfer case or one of the axles if you drive the vehicle and engage the front end. The two different gear ratios will do this. As far as the transmission goes, you have a problem with the governor inside the transmission and may have bad second gear parts. Have a mechanic pressure test the transmission and diagnose the shifting issue for you.

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2003 jeep liberty stuck in reverse, shifter is stuck…but crawling under and trying to manually shift from transmission stuck
ANSWER : Hi there. Based on what you have written above, it is highly probable that the inner linkage has come loose or there is an obstruction within the inner gear set that is causing your problem. Unfortunately, this typically requires dropping the transmission and repair or inspection from the inside. This is not a service our mobile mechanics are equipped to offer, so your best bet is to contact a local transmission specialist for assistance.

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Truck will shift sometimes then it doesn’t shift. If you wait a while it will shift again. We are trying to figure out what’s going on
ANSWER : Hi, thanks for writing in. The first thing I recommend is to make sure the ATF (automatic transmission fluid) is full.

Does the transmission shift up a gear or two and stay in that gear, or does it drive fine for a bit, then stop shifting until you turn the car off or sit still with the motor running? Or, do you continue to drive and eventually it begins shifting again. Are there any codes?

What I would do if I were diagnosing your truck would be to connect a scanner and study the data while driving to know what is going on. Without said data and not quite being clear about what is happening, it comes down to solenoids or sensors that the TCM (transmission control module) uses to calculated shift points based on load values determined by the PCM (powertrain control module).

I’m afraid all I can offer you at this point is suggesting you make sure the fluid is full and clean. If it isn’t clean, begin by replacing the filter in the pan and do a transmission fluid exchange, not just pan drop with a drain and fill. This doesn’t get all the ATF out of the transmission, and when there are problems, it pays to be as thorough as possible.

I recommend the following inspection if you should need further assistance: Car hard to shift

Hope this helps and best of luck!

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I have a 1991 Ford F250 has all the gears if you shift manually but will not shift down by itself
ANSWER : Hi there. You’re right, guessing can be very expensive. However, if I had to make an educated guess about your shift concern, it sounds like either a shift solenoid/solenoids is malfunctioning or there is feedback in the wire harness to the shift solenoid. I would take a look at the electrical wiring diagram and begin diagnosis from there. If the overdrive function is on and the transmission will shift from 1st to OD, then there is definitely some feedback somewhere. How do you know what gear the transmission is in after 1st? Do you have a scan tool connected that can provide that information? If this is more of a "it feels like it shifts from 1st to overdrive" then I suggest having a qualified technician perform an inspection to determine what is actually happening and diagnose the concern. Your Mechanic has several available technicians that can assist you with a transmission is not shifting correctly inspection.

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Popping noise while shifting manually on a 2004 Volvo XE 90
ANSWER : Leave it alone. That’s a Volvo. I’m amazed it still shifts decently as old as it is. Because they have horrible automatic transmissions. I would just say leave it alone and don’t ever mess with manual shifting on a Volvo. That’s an old system and you can break something. Then when you find out that’s 4-5,000 dollars to rebuild the transmission, you are not going to be happy camper. If this becomes a bigger problem, you may want to enlist the help of a professional, such as one from YourMechanic, to inspect your shifting issue and let you know exactly what needs repair.

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When vehicle is in the prosses of shifting there is a vibration. But it runs fine after shifting. What could that be?
ANSWER : Hello, thanks for writing in. From what you describe it would appear that there is more than one issue. Vibrations during shifting can be caused by several things. The first thing I would do is check that the transmission fluid is topped off and that the fluid is clean. Once the fluid is verified I would then carefully examine the transmission and engine mounts to see if they may be worn out. Worn mounts can cause vibration, as well as knocking sounds if they are worn enough. The grinding sound that you are experiencing during starting may be due to a worn flexplate or starter. When the starter is engaged a gear is extended, which contacts teeth on the flexplate, to turn the engine. If either the starter or flexplate teeth wear out, they can produce a grinding sound, which may eventually progress into a more serious issue. I would recommend checking the starter gear for any signs of wear or damage. If you would still like help, consider having one of our expert automotive technicians come to your home or office to look at and diagnose this vibration issue for you, and make any repairs as needed.

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