Q: Transmission grinds, clunks, & whines on interstate

asked by on

I was driving on the interstate and I heard a noise like grinding metal. At first, I thought I had a flat tire, so I pulled over but couldn't find anything wrong with any of the tires. After entering back onto the highway, the sound returned. Not only the grinding noise, but there was a 2nd high-pitched whining sound coming from the transmission. That was followed by a clunking that kept occurring and then something blew! My car began to slow down even though I was trying to accelerate. I pulled to the edge of the highway and turned the car off. Then turned it back on again. When shifting from Park into Drive, it did so fluidly and also from Drive into Park. However, when I started trying to move forward, it started making that clunking noise about 2 times per second. No warning lights came on and I am fairly sure that the transmission fluid is in good shape. What is your diagnosis for all of this and what will fix it?

A: The driveshaft and final drive assembly nee...

The driveshaft and final drive assembly needs to be checked. This is possibly caused by a failed center driveshaft bearing. The rubber insulator can fail and cause this type of issue. The vehicle undercarriage and driveline will need to be inspected. A center bearing that comes apart while driving can be extremely dangerous so this issue should be checked out immediately. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the tools and training to diagnose the grinding transmission noise and restore safe operation to your vehicle.

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・Save up to 30%

Get a quote

What others are asking

Q: Fans not coming on.

Hello. You engine should be equipped with a viscous fan for the cooling system. It uses heat from the radiator to engage the fan so that it spins with the engine, which pulls air through the radiator. Typically this fan...

Q: Gas pedal unresponsive, then suddenly jerks the car forward - 2015 Nissan Rogue

Hello. The new electronic throttle systems are very sensitive to a driver using two feet to drive and if you are still touching the brakes and trying to accelerate it will not let you. This programming is due to all...

Q: Shifting won't go into gear - 1973 Chevrolet C20

Check fluid level in the transmission. Did you correctly engage the front pump with the torque convertor, and filled the torque convertor with fluid before installing it? Let the truck idle 15 minutes or so, and check for Drive/Reverse after...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.