Skip the auto shop - Our mechanics make house calls

Q: Vehicle bucks while driving

asked by on

The other day, my vehicle jerked roughly while I was driving - I was doing about 55 mph at the time, eased back on the throttle, and the SUV suddenly jerked like I'd hit something. It happened again a few miles later. When I checked the U-joints, they looked good. The transmission fluid is brown, though. I don't want to waste money on a transmission flush if the transmission itself is going to die soon. I know I'm going to have to get the fluid changed anyway, but would old tranny fluid cause my vehicle to buck like that? Or could it be something else?

A: It’s not likely that servicing your transmi...

It’s not likely that servicing your transmission will fix your problem. Without experiencing the problem firsthand, it’s difficult to say if what you have is an engine or transmission problem. Obviously, internal transmission issues can result in a harsh downshift that may feel like bucking when you let off the throttle. However, and engine performance problem, due to a failed sensor or something of that nature, could also result in the vehicle bucking. I suggest you have a trained professional diagnose your vehicle first hand to determine the cause of the bucking you’re experiencing.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Rattling and bumping noises underneath car & getting worse

Hello. Unfortunately, if this is not a mechanical repair to the powertrain it would not be considered under the Lemon Law. Most of the time this noise comes from the exhaust. In a lot of cases, unbolting the exhaust and...

Q: Transmission issues and difficulty going to reverse

When you say difficult do you mean shifting the gears? Check the shift column for worn out bushings. On the bottom of the shift tube under the dash, it would come loose and shifting gears may not put the gear...

Q: Fuel delivery line leak

Your Volkswagen having a leaky fuel line is a serious situation. Fuel leaking from any location is a big safety concern for you and for the health of the vehicle. It is at times like these that I highly recommend...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...