Q: Hard clunk noise shifting/downshifting in 2nd & 3rd

asked by on

While driving and I am shifting from 2nd into 3rd gear, there is a hard clunk noise. This also happens when I am downshifting from 3rd down to 2nd gear. I went to the local dealer to have this fixed, but was told that this clunking noise is ‘normal’ for a 4WD truck. I have had many 4WD GMC vehicles in the past and none of them had this kind of shifting problem. What is causing this hard clunking noise so that I will know how to get it fixed?

Hello there, thank you for asking about your 2006 GMC Sierra 1500HD. Since you say it only happens when shifting between 2nd and 3rd, my guess is that the noise is internal to the transmission. A faulty shift solenoid could also be the problem, but then the Check Engine Light would likely be illuminated. The only way to know for certain is to have a professional listen to the noise firsthand. I suggest having a certified technician from YourMechanic come to your home or office to inspect the shifting noise and make any necessary repairs.

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. Hard clunk noise shifting/downshifting in 2nd & 3rd

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: Transfer case leak

Hi. The transfer case leak is a very common issue with these vehicles, especially at high mileage. The problem occurs when the pump for the transfer case begins rubbing against the side of the case. Over time, it will drill...

Q: Q: Engine knocking.

The most common noise like this is the serpentine belt tensioner knocking noise. The belt and tensioner replacement is the most common fix.

Q: Put a new transfer case on, now tranny won't shift out of first unless I do it manually

Hi there, thanks for writing in about your 2000 GMC Sierra 1500. Your transmission and ABS system need a vehicle speed reference to operate correctly. The transfer case has two speed sensors located at the rear extension housing. Inspect the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...