Hi all! I’m having a very bizarre issue with our 2021 Jeep Grand Cherokee L, Limited 4x4. We have just about 2,000 miles and a very bizarre knocking sound has developed that sounds like an engine or transmission knock or vibration that is very challenging to replicate at the dealer due to the time it occurs under certain conditions only. When it happens, the vibration can be felt under the passenger floorboard relatively violently.
The knocking sound only develops when the vehicle has been driven about 30 or more miles and the motor and transmission are very warm. It makes no sound when in reverse, neutral, or park. Only drive. If just doing short mileage drives, the problem never develops. I had my wife put the vehicle in drive while I looked for the location of the knock and it seems like it’s not coming from the motor but again somewhere near the transmission and more abundant under the front passenger floorboard area.
Has anyone encountered this issue or know a cause? Bad transmission/motor mounts? Faulty pulleys?
I plan to drive it straight to the dealer the next time it exhibits symptoms. Any help or similar narratives are greatly appreciated!
The knocking sound only develops when the vehicle has been driven about 30 or more miles and the motor and transmission are very warm. It makes no sound when in reverse, neutral, or park. Only drive. If just doing short mileage drives, the problem never develops. I had my wife put the vehicle in drive while I looked for the location of the knock and it seems like it’s not coming from the motor but again somewhere near the transmission and more abundant under the front passenger floorboard area.
Has anyone encountered this issue or know a cause? Bad transmission/motor mounts? Faulty pulleys?
I plan to drive it straight to the dealer the next time it exhibits symptoms. Any help or similar narratives are greatly appreciated!