Q: Transmission shifting hard and thumps.

asked by on January 04, 2016

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.

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

What others are asking

Idles but when driving it acts like its out of fuel.

Check all of the battery ground cables to the car on the battery, engine, and chassis. There is a bad ground somewhere that is causing the ECM to not work properly. This would cause the fuel pump to not work...

need to find bleed point for coolant on 2001 lexus gs300

Hello, thank you for writing in. There is not a bleeder valve on the cooling system, as the newer models are designed to "self bleed". Your owner's manual can confirm this, and give you more information on how your specific...

I have a flat tire and the jack point is rusted.

Hi. If you look about six inches to a foot behind the jack point, the body of the car is there and is safe enough to use as a jack point for the car. The car jack may not fit...

A few weeks ago, my 2001 Honda Accord EX started overheating. I took it to my mechanic 2 days later and was told my coolant hose

Overheating can damage the cooling system thermostat which, in turn, will cause continued overheating. Consequently, testing and replacing the thermostat should be among the repairs to consider. The burst hose, that is the coolant leak you first observed, could have...

starter/fuel pump fuse keeps blowing.

Hi there. This problem is commonly caused by a frayed or exposed wire within the fuel pump or the fuel pump relay. When the signal is sent to the fuel pump by the ignition relay, the exposed wire will create...

The car shut-off as I pulled into my driveway and has not started since. It will "turn over" but will not start.

The vehicle may have jumped timing from the timing belt teeth broken off. This is why you got it to make backfire noises. You should have the timing belt timing checked to see if the timing jumped. Another problem these...

Transmission shifts into 1st and 2nd only. When it goes into 3rd gear, the engine revs up and seems as if the transmission is in neutral.

Hi there. According to the shifting charts to your transmission, third and fourth gear both use the Overdrive Clutch as a holder to get the gears with the Underdrive Clutch and the Fourth Clutch. Since your vehicle will only get...

Engine light came on

The "Check Engine Light" indicates a fault being stored in the engine computer. A triangle shaped light with a circle around it indicates a fault in the electronic stability control. To diagnose these issues the faults will need to be...

Trunk opening on own

It sounds like there is a problem with the electronic trunk release. The button may be shorting out and telling the latch to open on its own. The problem could also be that the trunk isn't fully closing. Try pulling...

Related articles

The Best Used Cars to Buy If You’re Over Six Feet Tall
While While shorter than average drivers can have a tough time finding the right car, it’s equally hard for taller drivers, perhaps more so. If you’re feeling squished, or have to hunch over the wheel to drive, then you’re not...
The Best Used Cars to Buy If You’re an Architect
Obviously, Obviously, architects appreciate beauty and symmetry. This is not just the case when it comes to their building projects, but also in terms of the vehicles they choose. We have evaluated several used cars, and identified the Mercedes...
How to Buy a Classic Cadillac
Cadillacs are the ultimate in luxurious domestic vehicles and have been for more than century. Classic Cadillacs have been under the General Motors umbrella since 1909 and consistently rank at the top of a list of premier automobiles. Classic...