When i drive it shift hard and it wont shift until I stop and start again wat seems to be the problem
Expert automotive mechanics share their insights :
Hello and thank you for contacting this site. There may be a problem with the governor or VSS (Vehicle Speed Sensor) that is causing the transmission not to shift again until the vehicle comes to a stop. The pump pressure could be maxed out making all of the shifts hard. I recommend performing a transmission fluid and filter change and then rechecking these symptoms.
Sometimes dirty oil in the transmission can cause a lot of malfunctioning. If the fluid and filter is changed and the problem still exists, then the transmission would need a new governor or VSS and the pump would need to be checked for proper pressure. If the pressure is too high and your transmission is electronic, then the pressure regulator solenoid needs to be replaced.
If you need assistance with your transmission, then seek out a professional, such as one from this site, to service your transmission fluid and determine if there are any problems with other components on your car.
What do you need to know about your car from an experienced mechanic?
We have included a variety of viewpoints, from academic articles to blog posts to personal essays. We believe that by reading these different perspectives, you will be able to develop a more nuanced understanding of this topic. :
Transmission Fluid Low or Poor Condition – Vehicles low on transmission fluid or that are operating with worn out or contaminated fluid are likely to experience hard shift conditions. Lack of adequate lubrication within the transmission can cause several problems, including hard shifting.
Oftentimes, hard shifting can occur when you fail to change transmission fluid at the recommended interval. In the event that your transmission fluid gets low or dirty, your vehicle`s ability to shift could become compromised.
A damaged fin or bearing in the torque converter can cause hesitation in the transmission shifting, or the transmission to slip out of gear entirely. This is because the engine torque is not being efficiently converted into the hydraulic pressure needed to shift gears within the transmission.
If your automatic transmission is shifting roughly, shifting late, or slipping (engine revving without the car accelerating), it often means that it`s low on transmission fluid. And that`s certainly an easy problem to diagnose: just check the transmission dipstick and see if the oil is low.
The Vehicle Speed Sensor measures vehicle speed. When it fails the transmission can stop shifting or shift late and harsh. A bad VSS may also inhibit overdrive and the converter clutch.
You may also have intermittent problems with the transmission shift solenoid, which will cause shifting problems. This can cause hard shifting or shiftings at too low or too high RPM, for example.
Shift shock is the jolt felt when transmission changes gear. This jerk or shock feeling is observed in. lower gear shift (i.e. 1-2 or 2-3) and not in higher gears shift (i.e. 5-6 or 6-7).
When the temperature drops, transmission fluids with poor cold-flow properties can thicken and cause elongated and hard shifts until the fluid has warmed up enough to flow properly. Switching to a high-quality synthetic transmission fluid will help.
When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. You usually notice your car shuddering because it feels like it`s vibrating. Your car will vibrate even when you`re not going very fast. The shuddering makes the car lag and is very noticeable.
One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop.
If you notice a large delay between going into gear or between shifting gears where your engine is revving really high before it shifts, it may point to several problems with your transmission: Transmission Solenoid problems. Engine problems. Low or dirty fluid.
For example, in some situations an oxygen sensor can cause poor shifting in your transmission – if the engine isn`t running correctly, the transmission control module may misinterpret when and where it`s supposed to be shifting, causing erratic behavior at the transmission.
Disconnect the sensor from the housing on the transmission, as indicated in the repair manual for your car. Disconnect the sensor`s wire coupling. Using the multimeter`s voltmeter connect the probes to the ground and reference wires in the connector. If no voltage is received, the sensor is faulty.
The short answer to this question is no, you should not drive with a bad transmission. Sometimes, life happens, and you have to keep driving your vehicle even though you know that it needs to be serviced.
If you hear buzzing, humming, or clunking you need to have the transmission looked at. If you don`t, you risk causing further damage. Another clunking is when the car goes to shift from one gear to another. Instead of a smooth shift, the transmission just clunks, thuds, or drops into the next gear.
But a blown fuse No. 38 becomes a likely candidate causing a loss of power to the transmission solenoids.
If your car has an automatic transmission, the shift solenoid will shift the gears for you. The transmission control unit will take the information from the engine and speed sensors along with other parts of your vehicle to then decide when to shift gears for power and fuel efficiency.
The transmission oil pressure switch is unique in that its sole purpose is to collect data about the pressure found inside the transmission case, which impacts the timing and operation of shifting a vehicle to a higher or lower gear if needed.
Automatic transmissions that shift hard, jerk or shake during a shift change may mean your transmission fluid needs changed or fluid level is low. In manual transmission vehicles, abnormal gear shifts could indicate damaged gear synchros, worn clutches or other, more severe issues.
Shifting Before Your Car Has Stopped
If you switch between reverse, park, and drive too quickly, you run the risk of grinding your gears and causing serious damage to your car`s transmission.
Though changing transmission fluid can`t fix mechanical problems, it does make for smoother shifts and can extend the life of your transmission.
Turn off your vehicle`s ignition and wait patiently for 5 to 10 seconds. Start the engine and allow it to idle for several seconds. Switch off the ignition and wait patiently for another 30 to 40 seconds. Repeat these steps 2 to 3 times in order to reset your vehicle`s transmission control module.
The likely culprit will be a faulty torque converter, and we recommend not driving the car until you fix it.
To test the torque converter, you must step on the pedal to the floor and accelerate your engine for up to five seconds. The reading for the revolutions per minute (RPM) will max out at the stall speed.
