Q: Car is jerking at 45-50 then vibrates at 50 and jerks again 50-55 then drives smooth at 60 mph and in reverse jerks sometimes
My car has been acting funny and it is a salvage car, I purchased it a year ago. It just started recently jerking at speeds 40-45 then again at 50-55 but at 50 the car starts to vibrate but after 60 mph drives smooth. SOMETIMES pops when shifting into reverse. I took the car to Honda before these problems started occurring to have an 125 point inspection done. While I was there I had a brake drum that needed to be replaced. Had replaced and also told me there was a sound coming from my transmission but they couldn’t pin point what the problem was. Then a few months later all these problems started happening. I then took it back to Honda for a diagnostic test and they sure enough told it was the transmission that needed to be replaced. But I have asked multiple different mechanics and they have all told em different things but none of them think it’s transmission , some say could be a motor mount and one person said it could be some piece that needs to be replaced inside transmission
My car has 202000 miles.
My car has an automatic transmission.
Recommended Services
| Transmission Fluid Service | $140.08 - $502.73 | Get a Quote |
What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle speed sensors and engine speed sensors. Based on this information, the Engine Control Unit (ECU), or the Transmission Control Unit (TCM), executes the appropriate upshifts and downshifts by sending a signal to one of several shift solenoids. These transmission solenoids have spring-loaded plungers inside them, which are wrapped with wire. When this coil of wire receives an electrical charge from the TCM / ECU, it causes these plungers to open, allowing transmission fluid to flow into the valve body and pressurize the desired clutches and bands. When this happens, the transmission changes gears and you continue down the road. The computer controls the transmission solenoid in several ways. If the vehicle is equipped with a dedicated Transmission Control Unit, it can open or close the hydraulic circuit using a direct 12v signal. In some cases, the Engine Control Unit (ECU) can control the solenoid’s plunger by turning the ground circuit on and off. When this is not working properly, this can cause a jerking reaction, a delay in shifting or in some cases may cause the transmission to hesitate in shifting gears. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your transmission.
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing