Q: Transaxle makes a loud grinding noise when you accelerate

asked by on January 08, 2017

Hi, I own a 2003 Chevy Impala. The trans axle is making a loud grinding noise. The faster you go, the louder it gets. I know that it is not the wheel bearings because I changed them, along with the axles and the cb shaft. Do you know what the problem could be?

My car has 100000 miles.
My car has an automatic transmission.

Grinding sound from transmission Inspection $79.99 - $89.99 Get a Quote

Of course, first check the fluid level to be sure it is not low but if you are already hearing significant noise, there is probably mechanical damage that will have to be repaired. The problem has to be evaluated during a transmission noise diagnostic in order to give you a conclusive finding. However, on your particular model, if the noise is coming from the transmission there are a couple common causes. One is a failure of the input carrier and the sun gear which sits within. If the failure has progressed far at all, if the pan is removed you will see metal debris. The differential could also be worn to the point that the gear teeth in the differential become pitted and chip. If these faults in fact exist, the transmission has to be removed and rebuilt which is not a big deal on this vehicle inasmuch as this is a very common transmission and is in widespread use.

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

My truck seems to have a late reaction time to the accelerator.

This could be a variety of things ranging from poor fuel delivery to vacuum leaks. In the case of a vacuum leak, when you step on the accelerator and demand a quick increase in air/fuel flow to the intake system...

No power to half my fuses. Car was crunk

If you request an electrical system diagnostic, a certified Mechanic will use the Factory Service Manual wiring diagrams and trace the circuit(s) supplying the "dead" segment of the fuse box back to the source. Obviously, there is a break in...

Hood won’t close all the way

Hey Caleb. Thanks for contacting us today. Since this is likely an aftermarket hood, and we are not able to offer tips for anything beyond OEM applications, I think your best bet is to contact the manufacturer of the hood...

Dies when you stop pushing the gas.

Hi there. There could be an issue with the throttle body sticking and not adjusting correctly. Check the idle speed when the vehicle is parked in park and then in gear. The engine idle should be around 1000 rpm's in...

My 98 Tahoe won't start

Is the anti-theft system (Pass-Lock) light flashing ? If so, there may be an issue with the ignition switch or the chip in the key. If the chip is not sending a signal to the system, it will not allow...

Pickup coil shield missing on new distributor.

There is more than one manufacturer of distributors or its internal components and will operate the same way but have some small different changes that do not affect the performance of the part. You should not have any problems without...

I have water in my oil and need to fix the problem.

This problem is not an easily fixed problem. I would not recommend driving the car any more until a qualified technician can determine the problem. Water in the oil is a sign that you may have a blown head gasket...

Keep burning through head gaskets

Unfortunately this is a well know problem with the Chevrolet Equinox's. It really has nothing to do with driving habits, or lack of maintenance, but on the design of the engine cooling system, particularly the design of the head gaskets....

I can't get the cv axle out of my 2006 Chevrolet Equinox

The axle shaft is held in the transmission by a clip at the end of the shaft. With a quick blow the axle should come right out. There is a special adapter that is used with a slide hammer that...

Related articles

The Best Used Cars to Buy If You Just Retired
Here’s Here’s a cruel, hard fact – car manufacturers no longer target seniors. Instead, they devote their time and energy to appealing to the 18-45 demographic. Still, some features make certain cars more suitable for older drivers. We have...
The Best Used Cars to Buy If Your Kid's On the Soccer Team
If If you are a soccer mom (or dad), you know that you need a lot of space to transport your budding World Cup contenders, along with their gear. From time to time, you can also expect to be bringing...
The Best Used Cars to Buy If You're a Mobile Housekeeper
If If you are a mobile housekeeper, chances are that you are looking for a small, reliable used vehicle that offers good gas mileage and enough space to store your supplies. With that in mind, we present to you the...