Q: Transmission shifting hard and thumps.

asked by on

The transmission is shifting hard and has a thumping impact.

Hi there. Though there are many issues that can cause the transmission to shift hard in your Cadillac there are some common problems. If the check engine lightis not on, the problem can be caused by a bad engine or transmission mount. If one of these fail then the engine and/or transmission can move when the shifting occurs causing a hard shift. If the mounts are fine then the problem is usually pressure related from an internal problem or a pressure solenoid failure. If the mounts are fine then the fluid should be drained and inspected for signs of metal. Any metal in the fluid indicates a serious internal issue. This problem is best left to certified mechanic that has the tools to check the transmission properly.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Transmission shifting hard and thumps.

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: Does a 1994 Cadillac Deville have a crankshaft sensor or do I need to replace the whole distributor?

Hi there. The ignition system for the 4.9L in your vehicle, should be HEI (high energy ignition) and does not have a CKP (crankshaft position sensor). The pick-up coil is inside the distributor and most likely is not the cause...

Q: The traction control light comes on until the ignition is switched off, then it is off for a short time, then on again.

As you may know, your car is equipped with wheel speed sensors on each of the four wheels, which monitor wheel speed while relaying this information to the traction control module, which is controlled by the car's ECU. When the...

Q: Car check engine light flashing and vibrating a little, shortly after filling up gas tank

First the Check Engine Light should be addressed to see what code is stored. The code should be diagnosed as needed. The most common reason for the light flashing is a misfire in the engine. The misfire after getting...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...