Skip the auto shop - Our mechanics make house calls

Q: Trans JERK when accelerating from stop.

asked by on

My buick started intermittent Hard Shift, all gears and the trans shop installed a new accumulator valve, which fixed the hard shift problem, however about 3 weeks later it started a new problem : When accelerating from a stop, ( lever in D position ), it will JERK hard ( as if not in gear ), then upshift smoothly. I have been manually shifting the lever to low ( 1 ), for about a week and it has not jerked. If I start off VERY SLOWLY it seems to deter the jerk. I have installed a new front trans mount but it has not helped. I have put about 12,000 miles on this car since I bought it about 6 months ago. There were no shift / jerk problems when I test drove it before purchase. Could the trans, range cable be the culprit ?

My car has 86000 miles.
My car has an automatic transmission.

This may be a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car’s computer activates a transmission solenoid, which directs transmission fluid into the valve body to engage the correct gear. When this is faulty or not working properly, this can cause a delay in gear shifting or in some cases cause the car to not shift at all. This type of problem is amplified any time the transmission is low on fluid creating a drop in hydraulic pressure. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Get a quote

What others are asking

Q: 2003 regal dash gear selector intermittently doesn't light up. When it's out, car won't start and stuck in park

This is a electrical issue and to resolve it will require an electrical circuit/component diagnostic. Among the possible causes of the problem are a faulty ground connection, lack of power (or intermittent connection) to the dash display, a faulty fuse,...

Q: Quick my mechanic told me I need to change my motor mounts he listed front rear

You have a total of 4 mounts. There is one front engine mount and two transaxle mounts then there is a torque mount on top front.

Q: My Check Engine Light came on and when you push the gas it starts fluttering and shaking

This may be a sign of a failing throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the throttle plate inside the throttle body in relation to your foot position on...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...